Best Jazz pianist

Who's the best Jazz pianist, or your favourite.
My favorites by a good margin are Oscar Peterson, Gene Harris, Art Tatum, Thelonious Monk.  Gene Harris is the most under rated.
Wot!, no mention of Michel Legrand? Shameful!!!!!!................
(jovially said)...
Maybe not the best, but a huge influence and way up there -- big Earl Hines and Eubie Blake fan.