Arch. Bazzite/Nobara are for noobs (in a positive way, don’t get me wrong). Gaming is in spot where you want stability but also a rolling release, since we have daily improvements on essential packages; as an experienced user you can use Arch for that; consider also even Valve is on it with the Steam Deck (Arch-based).
Nobara is very good for middle user that just want a ready-to-game distro; Bazzite is best for noobs, thanks to immutability; for an experienced user there are no reasons to not use Arch.