There are loads of great ones, but this drummer's vote for the best in rock are:
Simon Phillips
Marc Brzezicki
Danny Carey
Dave Garibaldi
Vinnie Colaiuta
Joey Jordison
Jerry Gaskill
...no knocks against Bonham, Moon, Peart, Porcaro, Copeland, etc., who are all amazing drummers.
For non-rock I would say it's a no brainer with Buddy Rich.
Again, there are many great ones--Bernard Purdie, Han Bennink, Tony Williams, John Hollenbeck, Omar Hakim, etc....but for the greatest ever, I suggest that you see Dennis Chambers in concert. And remember to wear diapers.