Don't care for a lot of placings on this list.
Specifically, Akali, Cho, Nid, and Nunu are all too high. Olaf and WW could probably be higher, as well as Grag.
Riven is not high enough. I'd take Riven over GP, Yorick, or Jax in *almost* any matchup. Better mobility, more CC, stronger early game and more well-rounded power level as the game progresses. Riven is strong all game long. Between Riven's mobility, cc, and exceptionally strong early game (as well as the rest of her game being very well rounded), I see her as pick or ban in many situations.