Ahh, nice! So many recommendations to go through! I've been into this vein for a good 7-8 years now and I haven't heard of several of these. Nothing I like more than new good music suggestions in the form of mainly hidden gems. This is going to take some time to dig through!
Have you checked out much dark/cold wave stuff? If not, I have an overflowing bag of treats.
RE: How To Listen To Synthwave: An Introductory Course - THE NIGHT DRIVING AVENGER