Might as well post some more unknown artist.

For the sad.
https://www.youtube.com/watch?v=K3Qzzggn--s
https://www.youtube.com/watch?v=dln0y0SKJTM
https://www.youtube.com/watch?v=TjPhzgxe3L0
https://www.youtube.com/watch?v=5X6JULjj6hU
https://www.youtube.com/watch?v=uSQt4ckq-dg
https://www.youtube.com/watch?v=IRr98d-L3zQ
https://www.youtube.com/watch?v=xIJQOqZjmZ4
https://www.youtube.com/watch?v=hdghQXpxhiY

Some Japanese ones
https://www.youtube.com/watch?v=D3ENLElaf8M
https://www.youtube.com/watch?v=hDVaqkYTmCQ
https://www.youtube.com/watch?v=B2HsdgVQ-cc
https://www.youtube.com/watch?v=46SjyfZUAKA
https://www.youtube.com/watch?v=OspcyvVcb3Q

This one is Icelandic
https://www.youtube.com/watch?v=ZxnqSTzq6-w

And some good ones.
https://www.youtube.com/watch?v=VPSoNx1gyQ4
https://www.youtube.com/watch?v=6wdZRSLJvPg
https://www.youtube.com/watch?v=ipO1K24DE90

Japanese ones.
https://www.youtube.com/watch?v=Lr1tfOysEV0
https://www.youtube.com/watch?v=9Gj47G2e1Jc
https://www.youtube.com/watch?v=sDj2ODmSbfk

The post wasn't directed at you personally seems GOG still butthurt about what I post here. it wouldn't let me post it normally so I figured I tag it to the person who created the thread.

https://www.youtube.com/watch?v=Sybi0z3Eltw

This entire album... Utsu-P is a legend.

https://www.youtube.com/watch?v=StZSPuXxh-Y

Gettin darker here....

https://www.youtube.com/watch?v=No3s7taLu0c

Even darker...

. . . anything by Portishead, really (wouldn't let me post a link).

Pretty much every second song by Deftones and Korn. Tiamat, Joy Division and King 810 are also an excellent choice to rip your heart to shreds.