Best Jazz pianist

None mentioned Carla Bley -- she's a true piano and band maestro and my favorite jazz pianist.
I've got almost complete collection of first issues of Dave Brubeck;
Adore Dollar Brand and certainly Chick Corea.

I recently discovered;
Atzko Kohashi

Through listening to Art Blakey and the Jazz Messengers I have discovered the greatness of Bobby Timmons. Not the best, but there are too many great ones to say "best."

Nobody has mentioned the excellent performances of Stanley Cowell !  Has anyone heard of Music, Inc. !    Dr. Cowell also recorded for Galaxy Records !