There are extensive VGA lists for all regions out there, but there’s next to nothing on the internet about RGB compatibility across the NTSC-U & NTSC-J regions. Also every PAL game is RGB compatible so we’ll be skipping that.
What I’m looking for are folks who play American & Japanese games through RGB and via legit unpatched discs. If you have tested a game just leave the name en region in the comments, and I’ll start putting together a list here on the main topic.
Games that don’t work via RGB (they’ll give you a black screen) will ALWAYS support composite and I’ll just put Non RGB behind em for. I’ll start with a few I know out of my head, and will test more stuff as I move along, but I really need your help, since I don’t own every American & Japanese release

Thanks
NTSC-U
Centipede: non RGB
Giga Wing 2: non RGB
Illbleed: non RGB
Skies Of Arcadia: non RGB
NTSC-J
Cosmic Smash: RGB
Gunbird 2: RGB
Ikaruga: RGB
Musapey’s Choco Marker: RGB
Psyvariar 2: RGB
Shikigami No Shiro 2: RGB
Under Defeat: RGB
Vampire Chronicle for Matching Service: non RGB