Well, if were no talking about just monsters of rock, I'd say Tony Williams is one of the best and my favourite drummer of all time.

this may be mean, but i can't help myself:

And Idris Mohammed!

+1 for zach hill

Bernard Purdie is decent.

TWallace wrote:...and no one's even mentioned Jeff Porcaro yet?!?!?!

hes gotta be one of the greatest...and i think hes done more sessions than just about anyone

and he had cool glasses and an ace mullet!

Yes! For my money, he played the best fill of all time--the next to last one during Steve Lukather's solo in "Hold the Line."

modar wrote:Cornbread from Engine Down.. powerful

He was my favorite part of that band. Outstanding live.

I also admire:
Simone Pace of Blonde Redhead
Tim Soete of The Fucking Champs
Brian Chippendale of Lightning Bolt
Zach Hill of Hella
Jesse Klecker of Upsilon Acrux
Carla Azar of Autolux
to name a few...

I can't choose just one!
There are too many great drummers out there, many already mentioned.

I was pretty impressed by Keelhaul´s very own Will Scherf.