Here's a few that I know that haven't been mentioned. Some of these guys are really obscure!
Mats Ekstrom (Ex-Candlemass; played on "Epicus Doomicus Metallicus")
Anders Eek (Funeral)
Any drummer that's played for Pentagram
Vinny Appice
Tom Hunting (Exodus)
Mats was Candlemass' drummer only for that first CD - he left after EDM because of scheduling issues with rehearsals. If you're looking for good drumming, listen to Candlemass' very first CD - their other ones aren't all that spectacular (IMO, Jan Lindh, the guy who replaced Mats, is much less interesting than Mats was) drum - wise.
If you're looking for drummers who play weird time sigs and use rudimental fills and everything in between, Anders Eek is GREAT with that. He may be a bit difficult to listen to due to the fact that he plays funeral doom - a type of metal whose tempos often bottom out below the minimum BPM of many metronomes. Some of his material's good to play, some of it's screwy - use your judgement here!
Pentagram's had many lineup changes throughout their career - their singer, Bobby Liebling, is their only constant member and the only Pentagram member who has played on more than one of their records. Drum - wise, they can be fairly simple, but you can find a lot of what you're looking for with these guys.
Vinny Appice is pretty well-known in the metal world. Any Black Sabbath / Dio material he's played on is fair game. That Heaven and Hell CD, "The Devil You Know" is particularly strong with respect to rudiment fills. I do a lot of my practice playing to that CD.
Tom Hunting's the outlier in my list because
he plays so damn fast; the other 4 play at a snail's pace in comparison (it's a moot point for Anders - he plays at a snail's pace anyway). He's a lot like Paul Bostaph or Dave Lombardo. Many of the fills I remember from Exodus' material are blazing rolls, which may not be what you're looking for if you're looking for more than singles / triplets! If your endurance isn't where it should be, then be very careful with this guy!