I gotta few ideas, but most are best in specific areas.
Speed & Best metal drummer: Derek Roddy.
I swear his feet must set the double bass on fire...
Tricks: Assaf Seewi.
You gotta love it when he juggles the sticks at 2:20.
Best Overall: Neil Pert.
Amazing drummer, no argument.
Personal Favourite: Mike Portnoy - Part 1, Part 2.
The Instrumedley was the first song I ever heard by Dream Theatre, and blew my fucking mind.
There are probably people better than the ones I've mentioned, but these are the best I know. Feel free to show me better, I'd love to see them.