Gentoo. Not an Arch fork, and uses OpenRC by default. I use it and love it. Portage is the best package manager out there, imo.
You can still get binaries of the really annoying things to compile, like Firefox. Otherwise, it's all source-based.
I'd advise installing it in a VM or on a spare computer first to get your hands around what it is.
In your case, you'll want to specify the following flags in you makefile:
OpenRC, -systemd
You'll add a bunch of others in there too depending on architecture and personal priorities.
Follow the handbook. https://www.gentoo.org/get-started/
There's also Calculate Linux, which is basically Gentoo with a graphical front end, but I think it's Intel only. CLI is more fun anyway.
Even if he loses, he will suffer no significant consequences, nor will the lawless movement that supports him.
He could lose all of these cases tomorrow, and it still wouldn't mean a thing. He could stand in the middle of Fifth Avenue and shoot someone, and there still would be no significant consequences.
The GOP are a lawless terrorist movement, but everyone else wants to "take the high road."