Been continuing the troubleshooting as I can and finally have HDCP & HDR working. Everything up to this point had left only the video card as the problem point. Went and looked through my folders for some older drivers as everything I had tried that's still posted at AMD didn't work, and found a 16.X version as the oldest.
Got that installed and HDCP connection was made and all the video services played properly. HDR setting showed back up in Windows display setting, but if I tried to enable it, the selector would immediately deactivate itself. Remembered something about HDR working with 17.x, so went back and started with the 17.x drivers I had. Loaded the older of the 2 I had, and HDR setting in Windows could be enabled and stayed that way. Went to my newer 17.x and everything still working good.
At that point, connected my USB BR drive, put a movie in, and happily watched it play without issue.
When I have some time this weekend, plan on slowing moving into the 18.x drivers and seeing what happens. I'll see how far I get, if it keep working guess I'll just be happy that something installed with the older version fixed whatever the issue was. If it breaks again, will be time to drop AMD a note.