[Aimless1]

Like others before me I'd have to go with Neal Peart/Rush & Kieth Moon/The Who. From another era, according to my mother, Buddy Rich.

 

[rwest1389]

Buddy Rich is amazing, but not rock if I'm not mistaken...

 

[Klisk]

Jimmy Chamberlin, though I'm sure he's been mentioned in this thread a million times already. Still gotta love the guy, though.

 

[Farrell]

Buddy Rich (He wasn't a rock drummer but he was a very big influence to a lot of drummers)
Neil Peart - Rush
Terry Bozzio - Frank Zappa
Bill Ward - Black Sabbath
Mike Portnoy - Dream Theater
Scott Rockenfield - Queensryche
Tommy Alridge - Whitesnake, Ozzy Osbourne
Cozy Powell - Black Sabbath, MSG
Frankie Banali - Quiet Riot, W.A.S.P.
Randy Castillo - Ozzy Osbourne, Lita Ford
Eric Carr - KISS
Nick Menza - Megadeth
Tommy Lee - Motley Crue

 

[MuseMan]

Neil Peart - Rush

Silas Utke Graae Jørgensen - Mew

Gavin Harrison - Porcupine Tree

Boris Williams - The Cure

 

[dspargo]

Early Neil Peart - Rush
Keith Moon
John Bonham

 

[Dr.Love]

Anyone mention Jeff Porcaro yet?

I don't believe there is a best, but he's good.