Pop_OS! and Bazzite were the first two I tried when I made the switch. They were advertised as working right out of the box, which they did not for me.

When I was trying Nobara, I learned I had to run something in the command line to get gamemode to work properly with Steam. Ever since then, Nobara has worked for my gaming needs.

A few tweaks are needed here and there, but it's literally copy and paste from protondb.