Lots of extremely brutal folks mentioned here but having seen quite a few of those mentioned actually track, I can tell you this much: DON'T USE WHAT YOU HEAR ON A CD AS ANY INDICATION WHATSOEVER OF A DRUMMER'S TALENT! Metal drumming these days has become a ridiculously inhuman feat and more folks than not cheat their way into impressing fans.
In a live forum, the following gentleman have proven themselves CONSISTENTLY (to me):
Kevin Talley (Dying Fetus): Flashmaster General! Speedy, flashy and tighter than a 14 year old girl
Flo Mournier (Cryptopsy): Maybe a tad faster and definitely more brutal than Talley, equally as tight, but also less creative, IMHO
Proscriptor(Absu): The ulitmate incarnation of metal perfection behind the kit --- this guy lacks NOTHING!!
Tony Laureano(Angelcorpse, now Nile): Extremely hard-hitting (a trait which is decidedly old-school these days) and fast. He's my favorite of all these mentioned simply due to the fact that in a genre which is permeated by mindless wankery, I actually am able hear individuality in his approach and style.
I really, really like Janne from the Crown and Per from the Haunted's recorded efforts -- they've both got some pretty interesting ideas and styles. But they've both also proven woefully sloppy in a live forum . . .