Welcome to the forum, Innsmouth! I think you have good taste in horror. I also tend to go for music with a melancholic and eerie edge. You have any music recommendations off the top of your head (American English expression)? Off the top of my head I'd recommend The Stone by Ashes Divide, Lithium by Evanescence ('Going Under' would be classic harder edge), and Sacred Springs (1964) by Akira Ifukube, here's a youtube link:
https://www.youtube.com/watch?v=sZL8PEPTjyA.