Top Tier Picks at Worlds for Every Role
I started by picking out all the champions that had greater than a 40% pick/ban rate and greater than a 50% win rate at Worlds. This gave me two ADCS, two supports, two junglers, four tops, and one mid. Because mid has a much greater champion pool, I expanded this to 25% PBR to pull in another two mids. This pulled in another ADC as well.
ADC
Lucian (78% PBR - 52% WR) Twitch (44% PBR - 70% WR) Corki (28% PBR - 70% WR)
Lucian was obviously the gold standard for ADCs at Worlds. In one sense, the Twitch win rate is potentially misleading in that he tended to be a priority pick for some of the stronger team while he was not really picked by many teams, but on the other hand that he was a priority pick for some of the better teams says something in an of itself, especially coupled with his win rate. Corki's success is interesting. Based on the results at the Quarterfinals and beyond, I would say that it is very helpful that he has a better early game against Lucian than does Trist. He did not seem to do very well against Twitch, but again some of that may be driven by the fact that stronger teams tended to play Twitch. Twitch and Corki were actually both played just over 20 times, but Twitch was banned much more often.
Jungle
Lee Sin (92% PBR - 55% WR) Rengar (42% PBR - 85% WR)
These were the only two junglers at Worlds with more than two games played and a positive win rate. That says a lot. Kha was typically considered the second best option after Lee Sin, but he had only a 43% win rate. Jarvan IV was typically the next pick, but he had an abysmal 35% win rate. Elise didn't do any better at 33%. Rengar, like Twitch, is potentially a bit misleading in his win rate because he tended to be played by the better teams, but again that says something. He was unusual in that he was actually banned more than he was picked.
Support
Janna (67% PBR - 62% WR) Thresh (80% PBR - 54% WR)
Please excuse me while I go back to spamming Janna in solo queue to try to rank up before the season ends.
Top
Alistar (100% PBR - 80% WR) Maokai (92% PBR - 62% WR) Ryze (87% PBR - 59% WR) Rumble (51% PBR - 52% WR) Irelia (26% PBR - 66% WR)
There has been a lot made of the fact that melee is useless right now. I think it's worth noting that the three highest pick/ban rates at Worlds all belonged to melee champions. These were Lee Sin, Alistar, and Maokai. Lee Sin is obviously valued for his ridiculous mobility and ability to provide map control early. Alistar and Mao are valued for the exact opposite reason, and show that CC tanks are incredibly valuable if they can actually tank - it's just that these are the only two in the game at the moment that can actually tank damage late game. Mundo's spectacular failure shows that if you don't have % damage reduction and hard CC, you aren't worth anything as a tank at the moment. Ryze warrants an entire post unto himself, but suffice it to say he may just possibly be overtuned. Rumble I suspect is largely there for the same reason Orianna enjoys solid success as a mid laner - a great ult that can single-handedly swing team fights.
Edit: Added Irelia based on a suggestion from Don Eulrich, who noted she was successfully picked to counter Ryze.
Mid
Orianna (41% PBR - 51% WR) Jayce (25% PBR - 58% WR) Yasuo (35% PBR - 66% WR)
At first glance Yasuo appears to have been the most dominant mid laner, but his popularity fell off a cliff as Worlds went along. Jayce was the exact opposite, as he gained steam as a popular pick as Worlds went along. It just so happens that Ryze counters Yasuo while Jayce can poke Ryze safely from a distance. I'm sure this has nothing to do with it though. Orianna, like Rumble, is just a solid champion who has a great ult that can single-handedly swing a team fight. Add in her utility, and she appears to be best in class for mages.
