OpenSUSE Tumbleweed is an awesome distro with up to date packages. KDE is also a great choice, especially with Plasma 6.0 around the corner.
I wouldn’t worry too much about Nvidia drivers, just follow OpenSUSE’s guide [1]. The remaining issues of Nvidia with KDE Wayland are getting fixed over the coming months.
Edit: OpenSUSE can’t ship some codecs by default for legal reasons (like RedHat, Fedora), but makes it simple to enable them (optionally through graphical YaST) [2].