Long drone-based works. Not much happens, but they're pretty relaxing. No vocals.
Start with 5 if you want something milder, 2 if you want something confrontational; 6 for something in between.

1. Thin, reedy tone dominates foreground, gradually lowering and filling out, with a softer buzz in the background. Around halfway through (3:30 out of 7:51) a much warmer, pleasant, almost Eno-esque tone starts coming in and the original thin tone drops out. Organ-like chords come in on an equal footing with the drone, which dominate by the end.
2. Warm tone starts out, slightly wavery; static/feedbacky tone enters around 2:50 with thrummy interference patterns. Industrial-flavored from here on out. Feedback picks up, ends with buzzsaw sounds.
3. High starry sounds start. Some activity in the beginning (not much) flattens out with progress. Similar to the first part of the first track, in the second part there's some soft static in the background. Ends with some clattering.
4. Starts off low, thrummy patterns again that soften into a smoother, higher tone. Ends with muted sounds of---well, maybe a far-away underwater factory? That's the best way to describe it that's coming to me now.
5. Ghostly haunting swooshy sounds; organ tones. One of the best.
6. Low ominous tones start, then whistling wind sounds that under which more ominous rustling and clattering; bass tones throughout. Ends with just the windy sounds. (This reminds me of Nurse With Wound's "Two Mock Projections"---the windy sounds aren't that far from a heavily processed guitar.)