Best Jazz pianist

I like many of those mentioned.  Of the newer generation of pianists, I really like Bill Charlap.

I loved Billy Taylor. He was a great pianist and he contributed greatly to jazz in NYC. He was a gentleman and an educator. I spent my musical formative years going to The Knickerbocker in the village to hear him. It was his home base and he was there most weekends. There was no cover charge and that was about what I could afford. Bradley's was just up the street and there were other clubs within a few blocks. He will always have a special place in my (musical) heart and music collection.

Among those still  drawing breath Brad Mehldau can play a bit .

Jelly Roll Morton is farther of them all.

oregonpapa said;

I love Monk.

I love Bud Powell.
I love Claude Williamson.
I love Hampton Hawes.
I love Brubeck.
I love Art Tatum.
I love George Shearing.
I love Bill Evans.
I love Tommy Flanagan.
I love Phineas Newborn Jr.
I love Ahmad Jamal.

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.