Don't forget Artix Linux, which is Arch Linux minus systemd, plus systemd "stubs" to map certain functions expected by systemd-dependent software to use the equivalent, non-systemd tool chain (e.g. elogind).E.g. there is void-linux with "runit" & gentoo-linux with "openrc".
You even get a choice of init systems:
1. OpenRC (default)
2. Runit
3. s6
4. dinit
If I have to use Linux instead of FreeBSD, Artix with OpenRC is my choice. While not as stable as FreeBSD, it is rock-stable for a Linux distro - even though it is a rolling release.