Okay so. As I was giving up, I did it. Newest drivers 19.7.1 works, both cards passed trough on their own VMs. I played around again with different combinations and way too little sleep, too many hours in this forum and then I found this one below:
Modifying this for my system, using correct identifier for my first Radeon VII, I managed to put it trough. With OVMF and Q35 3.1 I succesfully installed current AMD drivers. Just Display and audio, no radeon software yet. Wanted to play safe first.
I have minor audio issues, but I guess I am past worst problems. I hope. Thanks @bastlanyway for replying, and thanks @Siwat2545 where ever you are In to the new misadventures!