I think I have some of this stuff or related stuff recommended to me somewhere on YouTube. Hasn't really caught my interest. YouTube recommends the weirdest stuff sometimes.
The Harp Twins, their version of Iron Man.. A harp should really not do that kind of sounds, but yes, it would be fitting to have it start playing by itself with that distorted sound in a horror-game. Btw, they have done tons of covers of modern songs on harp.
Some more views:
Corvus Corax with a cover of Twilight of the Thundergod (by Amon Amarth). Live from Wacken open Air festival. Starts about 45 seconds in.
In Extremo - This Corrosion (cover of a Sisters of Mercy song)