I'll second Max Richter's Sleep. Timeline by Edith Progue might interest you too. The later is my favorite xcalm down" CD even before Max Richter's, when I'm too restless to sleep.

And maybe Glitch (music) might be of interest as a starting point, especially the "Clicks & Cuts Series" which gave me a lot of pointers to interesting niche artists.

https://en.wikipedia.org/wiki/Clicks_%26_Cuts_Series

https://en.wikipedia.org/wiki/Glitch_%28music%29