I’ve been on a cosmic horror kick lately, and what I’d really like to read is stories or novels of the awful and unfathomable on a spaceship. Stories where we go to them, poke what shouldn’t be poked, scan what shouldn’t be scanned, and things proceed from there.
Maybe has some of the elements you’re looking for:
https://en.wikipedia.org/wiki/Bio_of_a_Space_Tyrant