Black Metal.

I don't think you would find anything of interest, but I'm pretty sure I posted a list in the "I'm tired of seeking - and not finding - the trade lists thread" or whatever it's called in RC.
 
Ajatarra is pretty bad in my opinion. Bland and repetitive dark black/death metal stuff with a gloomy, goth edge. Blech. The album last year was boring as fuck.

true. but one of their albums is really good. It's pretty hard to find really nice slow/mid-tempo stuff.

the song "Haureus" is cool. Reminds me of Hypocrisy
 
I think Bach's "Toccata and Fugue in D minor" could easily be pasted into many a black metal song without compromising the musical structure at all. Probably been thought of thousands of times, but I still believe it would be awesome to make a metal song out of that.

My dad plays that piece at church every Sunday before Halloween.

On the subject, I think Anthems to the Welkin at Dusk could work pretty well transcribed to a pipe organ score, at least as a medley.