I used Fedora, and am now leaving for the exact reason you’re leaving Arch (plus IMO bad repos). Switched to openSUSE Tumbleweed a few months ago and am having a much better experience than with Fedora :D; I use the PC for programming, audio recording and mixing, document stuff, etc. (No gaming though).
Nobara is good but does break regularly, FYI… If you’re a “power-user” I wouldn’t recommend it as a daily driver.
There’s also Void Linux, which hasn’t ever broken on me due to an update, but is still a lot of work, due to its nature. It’s actually quite stable though, and you might enjoy it, since it’s quite similar to Arch and has very large repos.
I can’t say much about immutable distros, as the only one I’ve used is bazzite, which was kinda horrible (broke constantly).
Well, I hope that helped. Good luck!
+1 for Quod Libet