If you've been wondering about what champions the higher ELO players pick to really ream the competition, here's some listings by one of the better players in the competitive League. If you've ever wondered what team compositions tend to do better, and what champions really excel at their individual roles this is the guide for you.

Please note that this is quoted from another source. I did not create this material, but it holds a great deal of useful information for making informed choices.

HOW TO USE THIS GUIDE
These are based on the observations of some of the best players in the game. They are tailored for ranked play, but are very applicable to normal. This is geared to higher-ELO players. When you first start playing, Evelynn will probably be the god of every game until you learn stealth mechanics and focusing. If you are looking for advice on what champions to concentrate on, and which are worth paying the IP for this is the guide for you. If you are having trouble in general or just want some quick tips and tricks, go check out another guide.
There are two sections of this guide. The first section deals with solo play. That is, you either solo queue or duo-queue. When you queue with larger groups of people, much more interesting options and teamwork opens up. The solo guide is designed so that you can pick champions that complement any play style that the rest of your team may pick.

Solo Queue Tier List

* Tier 1 -  Pantheon, Corki, Malphite, Gragas, Rammus, Cho’Gath, Vlad, Kassadin, Sona, Twitch, Warwick, Kennen, Shaco, Morde.
* Tier 2 – Ashe, Tristana, Udyr, Kog’Maw, Annie, Miss Fortune, Morgana, Anivia, Sivir,  Mundo, Garen, Zilean, Sion, Janna, Akali,  Xin Zhao, Nidalee,  Ryze, Teemo, Karthus.
* Tier 3 – Nunu, Malzahar, Kayle, Lux, Alistar, Fiddlesticks, Poppy, Shen, Master Yi, Galio, Singed, Eve, Olaf,  Amumu, Swain, Leblanc, Taric, Soraka, Blitzcrank, Heimerdinger.
* Tier 4 – Twisted Fate, Irelia, Veigar, Tyrndamere, Katarina, Nasus, Ezreal, Jax, Trundle, Gangplank, Urgot.


Explanations:

Tier 1 – These champions are at the top of this list for a lot of reasons. The biggest reason being you can actually carry a team with them. In League of Legends its very hard to be a “true” carry as this game if very team oriented. If you’ve ever played a 4v5 you’ll know what I am talking about as it’s literally impossible to win. So I find these champions in Tier 1 lane VERY well in terms of being able to kill creeps well, harassing the enemy champion, and survivability. For the junglers in tier 1 it’s because they control the jungle well, and do it safely. Also gank well and if get fed can actually carry games themselves. All these champions have great early games for the most part and just continuously get stronger as the game goes on. These are the pub stomp kings of the game in my eyes currently.
 
Tier 2 – These champions like tier 1 champions are great laners, and are great to have on your team in Solo Queue. They just don’t carry as hard as other champions in tier 1 I find. Their early game laning power can be almost equal to the strength of tier 1 champions but I find the tier 2 champions to be slightly weaker than these tier 1 champions in terms of how hard you can carry a solo queue game with them. They are still the creme of the crop in Solo Queue and shouldn’t be underestimated.
 
Tier 3 – These champions I find to be great 3rd, 4th, or 5th picks on a team. They are 100% viable but these champions generally aren’t as strong in lane as tier 1 and tier 2 champions and often take the Duo lane as they aren’t as strong as solo’s. A few of them in this tier can stand toe to toe to a lot of tier 1 and 2 champions in a Solo lane but I find they just aren’t sought after as “great” Solo Queue solo laners. These champs are all 100% viable in solo queue. I just find them to be slightly weaker than tier 2 champions in Solo Queue.
 
Tier 4 – Now tier 4 is a tricky tier I find. These champs are all 100% viable for Solo Queue. If someone says they play a great X champion in tier 4 than you can let them solo or play that champion. These champions are simply tier 4 because they require a lot more farm I find than other champions to reach that “carry status” in Solo Queue. These champions are usually played by people who love these champions for their design and play style so usually people who play these champions I find aren’t bad players at all so letting them play these champions sometime is a good choice. These champions problem isn’t poor laning or really anything other than they require a lot more effort to be good at and a lot more skill to do well on is all. They’re all fun champions and I suggest you give them a whirl and try them out!

DISCLAIMER! – Now remember everyone. This is just an OPINION and nothing else. Take it with a grain of salt and remember not to flame anyone in-game over me or my lists!
 
SOLO QUEUE ADVICE – Always remember to build a balanced team that is strong in all 5 aspects of the game. Get two strong solo’s, a strong duo lane, and a strong jungler and your chances of winning will increase drastically! If you’re not 1st or 2nd pick please pick accordingly to the rest of your team. Communication in pregame chat is the key to success! If you have an AD and an AP carry then the remaining roles of Tank, Support, and Jungle need to be filled! It’s the best way to become a great League of Legends player by having a well rounded group of champions you can play! Master all aspects of the game and not just one!

Draft Mode Tier List

* Tier 1: Anivia, Sivir, Ashe, Corki,  Annie, Warwick, Shen, Janna, Sona, Taric, Kennen, Rammus
* Tier 2: Pantheon, Tristana, Twitch, Kog’Maw, Miss Fortune, Morgana, Kassadin, Zilean, Garen,  Amumu, Shaco, Xin Zhao, Udyr, Vladimir, Olaf, Gragas.
* Tier 3: Cho’Gath, Malphite, Twisted Fate, Poppy, Karthus, Trundle, Mordekaiser, Veigar,  Akali,  Sion,  Nunu, Irelia, Galio, Heimerdinger, Singed, Yi, Fiddlesticks.
* Tier 4: Teemo, Lux, Leblanc, Ezreal, Nasus, Kayle,  Soraka, Blitzcrank, Gangplank, Nidalee, Jax, Eve.
* Hard to place on a team: Swain, Katarina, Alistar, Ryze, Urgot, Mal’zahar, Tryndamere, Mundo.
 
Tier 1 – These champions have proved time and time again that they deserve to be here. These champions are game changing if you can get them most of the time. Player skill combined with knowing how to use these champions correctly will ultimately result in success.
 
Tier 2 – These champions are barely under tier 1. They all again do their roles incredibly well and are should be considered highly valuable picks. They all synergize very well into the vast majority of viable line ups. Players should be playing these champions if they are looking to improve their game and step into the competitive scene. Master all of the tier 1 and tier 2 champions and you will be a serious force to be reckoned with.
 
Tier 3 – These champions are still very viable on SR but are simply out done by tier 1 and tier 2 champions. They can still compete with all of them but as far as viable line ups go these won’t be the champions you’re going to ban or first pick in any draft mode. These are your 4th 5th picks in your line up to complement your line up or effectively counter the other teams picks. These champions are still very viable overall but just aren’t champions you will strive to pick or have in your line up all the time.
 
Tier 4 – These champions don’t fill the roles of the champions above them as good as they do. They really aren’t thought of other than your last pick to add a special extra something to your line up. Extra burst, extra utility, or that 1 more support champ you think you will make your line up that much better. Generally they really aren’t sought after picks in a competitive line up but they can still be played viably but are the bottom of the barrel in terms of competitive picks.
 
Hard to place on a team – These champions I find aren’t as good as others in terms of competitive picks. They don’t really help or add anything game changing to you line up or anything you would really want on a competitive team imo. They are all fine champions for solo queue for the most part but in terms of a 5v5 tournament draft mode I wouldn’t expect to see any of these champions there. They are simply out done by other champions who do their roles better then they do.