Here ya go:
Tier 1: Jayce, Kassadin, Darius, Yorick, Diana, Lulu, Ezreal, Jax, Pantheon, Poppy, Rammus
Tier 2: Blitz, WuKong, Nunu, Malphite, Sona, Urgot, Teemo, Amumu, Kog'Maw, Janna
Tier 3: Brand, Talon, Ahri, MaoKai, Ryze, Dr.Mundo, Singed, Corki, Nautilus
Tier DUMB: Zilean+Rammus Duo Queue, always back-capping (more of a hate shout-out than an actual suggestion)
This tier list is a reflection of my own experience, and from the popular sentiment of the folks in DominateDominion (who play Dominion more than all other players combined, probably). It is also heavily contributed by DD tournaments, and their popular Picks/Bans.
This tier list disreguards who's in what lane, and in the future I hope to categorize it accordingly. But in the meantime, this is what I've got.
Before you downvote... I know I'm missing alot, so please help me improve this list with any suggestions! I'm out to do a good job at this, so any suggestion will help me alot!
Alternate, and Possible Better Tier List
Tier 1: Champions that you are good with
Tier below 1: Champions that you are not good with
EDIT: Some of the champs on this list might not deserve to be there. After all, this is an OP champ tier list. Mundo? Corki? Not sure. Be vocal and let me know about it!
Also: I think Brand needs to be higher but not sure where to put him (I AM ONLY ONE MAN!!)