If anybody is writing anything creepy, YouTube has a TON of dark ambient stuff; some of the tracks are over an hour long! The cryochamberlabel has some really good tracks.

I have a 'sad', 'dramatic', 'creepy', and 'various' playlist (considering adding happy and/or feels) for writing, made up of instrumental songs from movies, games, etc. It's good to get me into the right headspace. Anything with words, though, is just distracting; if I have to listen to rock or pop or something, I do it in a language I can't understand.