>>33410651The competitive community essentially agrees that the game is extremely balanced and every character (except maybe crogunk, but even then that's a maybe) is viable even at top level play, so there's no really agreed upon tier list due to how balanced it is.
The only consistent opinion for exact placements is that braixen, mewtwo, weavile, and lucario are at the top, and crogunk, gardevoir, and chandelure are at the bottom. Other then that, and the fact that the gap between every character is pretty small, there's not that much agreement.
Pic related is the evo/2017 worlds champion's tier list, for reference.