KDE has their own plasma distribution, I've never used it but it seems like a solid option
I've personally used it for nearly 3 years now, and never had any problems with KDE Neon. It probably isn't a good option if you'd like to have the newest versions everywhere, since the base system is only thoroughly upgraded on every Ubuntu LTS release.
If you have any questions regarding KDE software or KDE Neon, I'd be happy to answer them on #kde:kde.org (Matrix) which is also bridged to #kde on freenode.
Was seriously considering using it for my primary desktop, but that'll have to wait until there's a viable RDP alternative.