Need Your Help - Music Suggestions for a Short Film

Hey r/Music! I'm making a short (5-7) minute documentary about a ghost hunter and I'm needing some music suggestions.

I'm looking for something very atmospheric, minimalistic, ominous....anyone have a suggestion? Or two? :) (I'm thinking something close to Nine Inch Nail's "Ghosts", or Balam Acab, though without the vocals)

For some background: I'm already in post-production, so I'm pretty close to being done. I have some pretty interesting footage filmed in a basement of an old, historical movie theater where a man (Will) was beaten, stabbed, and burned to his death. This is for a class and I'm not intending to distribute for profit, so I'm not worried about copyright violations (I'm under free-use as a student).