Linux base
Fedora silverblue ,centos steam, rhel alma rocky, nix os , arch, gentoo ,void, open suse.
Windows like reactos
It is mature enough to be usable and with better filesystem support like btrfs and more better security. Recommended if windows software are priority and can't use wine or bottles.
https://reactos.org/
https://github.com/reactos
Bsd base freebsd openbsd netbsd
https://www.freebsd.org/
