Echoing Hainbach, Nathan Moody and Jogging House.
Jogging House's label, Seil Records, has some other cool stuff on it like Worms & Bugs and Interlaken:
https://seilrecords.bandcamp.com/
Assember/Responder (Sean Curtis Patrick) has some good ambient / experimental cassettes
https://theattemptedtheftofmillions.bandcamp.com/
The new tape from AnnAnnie is really good modular ambient
http://store.modularfield.net/album/atmospheres-vol-1
all of Amulets' stuff is great
https://amulets.bandcamp.com/
the film score for the documentary called Cassette by the dude from LandscapeFM is nice
https://landscapetapes.bandcamp.com/alb ... film-score
Wild Card (new project featuring Marcus Fischer) just came out and i picked that up on tape as well
https://wildcardofcascadia.bandcamp.com/releases