XFCE + Compiz
The unholy combination of accelerated 3D graphics and performance, all without the stupid drawbacks of wayland.
Runs much lighter than KDE even with all the 3D cube and windows stuff enabled.
Extremely customizable as well. XFCE already does a great job of UI/UX, it just lacks a compositor to add flare (xfwm4 has no animations, only some blur effects).
Just use OpenSUSE