Wolves In The Throne Room are my favourite black metal band. I was questioning my interest in the genre until I heard Diadem Of 12 Stars. Totally blew me away. Huge, sprawling, suffocating, intensely beautiful black metal noise. If you're familiar with Agalloch - well, if Agalloch are using folkish, blackish, doomish metal to create their soundscapes, then Wolves In The Throne Room could be said to be making the same soundscapes with exclusively black metal.
Yeah, 65DOS are still active. Most of their other songs bring in some more electronicy stuff (I'm no expert in the genre so I'm not sure quite how to describe it). They're at a somewhat electronicish end of post-rock, anyway. I definitely recommend the album Radio Protector's from. The opener, Drove Through Ghosts To Get Here, is in a provisional all-instrumental DI list I'm working on.