Suggestions for bands/albums/just individual tracks that are so dark-hearted that they suck away any light emitting from anything even remotely close to it; and fit any of these words:

Dark, misanthropic, apocalyptic, moody, gloomy, nihilistic, bleak... but mainly fucking excellent.

Not angsty, shouty twaddle.

Obvious examples to start:
Godspeed You! Black Emperor, Joy Division, Amnesiac Radiohead era, Black Swan/Harrowdown Hill Thom Yorke.

Go!