There’s openSUSE tumbleweed. It’s rpm based like fedora and it’s rolling-release like arch. I don’t know what the 3rd party/nonfree software situation is like. Maybe someone else can chime in on that front.
I will add, as an arch user, I think you could easily tweak your current system to be less annoying with the updates, but I realize that’s not the question you’re asking so feel free to disregard that.