A 2-man duo composed of one of the most insane drummers, Zach Hill and one of the most insane guitarist, Spencer Siem and until just recently, adding vocals, bass, and a second guitar to the band. Their music is complex, noisy, melodic, experimental, and a bunch of other things at the same time.
A few examples of their songs, starting with their earlier stuff:
Biblical Violence.
Suistyle
Try Did.
The Things People Do When They Think No One Is Looking.
The last video is from their latest album. Their sound changed alot, it lost alot of the experimentation that I like about them, although its still a great album.
Also, some of the member's solo projects:
Zach Hill:
Hindsight Is Nowhere
Iambix Strays.
Unseen Forces.
Spencer Siem:
Track 2.
Track 4.