BUMP. Seriously, anyone who digs sludge or really pretty music should check them out. After seeing them live last summer, I am a huge fan.
I Name You Destroyer has a great pretty/ANGRY dichotomy that is really great amidst heavy riffs and really just different drumming patterns. The EP Lambs is also really awesome and has a few oddities in terms of tracks given length within the genre but it's possibly my favorite minutes by them. For those who really just want brutal sludge, their newest album Throned in Blood is a beast. Sludgier, more distorted riff fest a la High on Fire minus the Pike virtuosity, with really pretty lady/sludge moments like SubRosa or Jex Thoth. Ultimately, the band's almost schizophrenic approach to albums is what is so awesome. They go from serene little tracks that you might get from Zooey Deschanel (like the track Surface Tension) and then it goes to brutal metal (like in the track Queen B
http://www.youtube.com/watch?v=Rp2ufrY-WqE).