User blog comment:Henzukaya/Dark Souls location theme songs/@comment-4104124-20140119192029

You might want to look into some Aurastys to find some good themes.

"Anatomy" and "Gjallarhorn" (and more generally most of the songs from "Ideal(s)" album) might have the good atmosphere for either Tomb or Catacombs.

"Unlove" might be good either for Blightown or The Great Hollow