Help me find a linux distribution

Gentoo is not worth the hassle. you can get Arch, Debian, or OpenSUSE setup and working for GPU Passthrough faster than Installing Gentoo. plus even if he did use Gentoo, there is some weird shit going on with Ryzen and Gentoo specifically anyways. Compilation errors and kfaults. however if he just sticks with the amd64 accept keywords in his make.conf then Gentoo would be somewhat of a viable alternative. but either way it’s still a hassle if he’s been used to systemd for years and I wouldn’t recommend it anyways.

though if OP wants to go through it I made a thread a while back on my experiences with Gentoo. I’m still using Gentoo as well.