You could check out the Voodoo Moon youtube channel. Got some interesting stuff on there.

Let's see

Puce Mary
The Haxan Cloak
Wolves in Sheepskin (self promotion yes but jarring and dark is a perfect description of the sound)
Brighter Death Now
There's a Light That Enters Houses With No Other House In Sight by David Sylvian
Monei Hai by The Gerogerigegege
Gnaw Their Tongues
Supersilent
Univers Zero
Kevin Drumm
Wolf Eyes
The Body
Morton Feldman's Piano and String Quartet