God, I love last.fm for finding similar artists. Over the past few nights I've found too many fantastic bands I didn't even know existed.
Bison B.C. is a doom/sludge/stoner metal band from Vancouver. From what I've seen from their videos they put on a hell of a live performance, and they translate it perfectly to their albums. Although their latest Dark Ages has a bit too much screaming for my liking, Quiet Earth has more of a growled delivery that can actually be understood.
If you are in the mood to get your tits rocked off, give this a spin.