I’ve used Arch, Pop_OS for gaming in the past, was looking for a distro that just works and doesn’t have any extra fluff or do anything nonstandard. (For example I don’t like that some programs will only update through the pop shop on pop os and not through the terminal.)
There’s not a “best” distro for gaming, it very much depends on what games you play.
If you want to play latest releases, a rolling release is most probably the best option for you, I hear Suse Tumbleweed is very good if you don’t like Arch.
If you want less “aggressive” updates but not exactly a stable, you can try Solus, it’s a sort of middle-ground between the 2.
If your games are not the latest ones, a Debian-based distro is a very good option, rock-solid, updated enough and without any “extra fluff”.
I personally use Linux MX XFCE and I’m very happy about it.
With Mesa compatible GPUs it’s objectively better to get Mesa updates ASAP and not wait for 6 or so months. The constant feature and performance improvements are especially crucial for gaming.
That’s if you use opensource drivers, good for AMD but not so much for NVIDIA.
Yes, that’s why I wrote “Mesa compatible GPUs”. NVidia and Linux don’t mix well.