I’m a big Ubuntu fan and it’s derivatives. PopOS is pretty snazzy, but it doesn’t have grub which can be a little weird.
Currently I’m running KDE Neon. I used to be a hard core gnome guy, but I’ve been seduced by all the performance gains KDE has. I just customized it to look like gnome (it’s infinitely customizable).
But if you want to stick to RPM land, check out OpenSUSE.
The other suggestion I’d have would be Manjaro which is arch based.