I'm just going to post the links to some of the songs I'm listening to right down here:
(They are MLP songs made by the fanbase, and are creepy/gory/horror songs, so if you don't like MLP to be portrayed in such a way, then don't listen to them. Also, the INSANE ones are 15 minutes long.)
Rainbow Factory INSANE- [link]
SLENDERMANE INSANE- [link]
Eurobeat Brony - Discord (The Living Tombstone's Remix)- [link]
I do not claim ownership of any of these songs. I just really really enjoy listening to them.