[mairdie]

For spine chilling, still have to say I’ll go with Gregorian Chant.

[CondoleezzaProtege]

Definitely. There’s an Enya song very similar in sound to Gregorian chant that’s notorious for being used as a backdrop to a lot of raps actually.

This an instrumental sample:
https://youtube.com/shorts/jqlYVYwi4jg?si=do_7p9jY3tOJVDmK

[Bikkuri]

You should check out Enigma.