Lombardo (Slayer) is still tough to beat on his rolls.
There are so many death metal and powermetal drummers out there that can make a double bass sound like a machine gun, it's hard to pick between them.
As far as hand speed, going all over his set for fast fills, Mark Zonder (Fates Warning) is amazing. In fact, a lot of thwe prog guys can really do some amazing fills with serious speed.
Hmmm... that practically covered the good metal spectrum.
The fastest drummer is definitely an oldschool, death, power, prog guy right ?
Bryant