I have stock Fairphone, but disabled all Google Play Services and most proprietary apps, and replaced them with FOSS apps.
Idk how close this is to a privacy-respecting custom ROM, but I'm mostly just waiting for a good one. I really enjoy having the slide button to turn on Do Not Disturb. It's so amazing idk why not all phones have this.
I def want this working on the custom ROM I'm switching to in the future.