Linux Mint is the easiest one from the list, but all of them except Solus are fine. I personally recommend Mint or Debian, Debian Sid if you want latest kernel.
KDE Plasma (love the looks of it, though is my hardware enough?)
KDE should work fine, maybe with a bit of tweaking?
XFCE - LXDE - LXQT (because of “lightweightness”)
I daily drive Xfce and even on a beefy PC this DE is really great. It may not look cool by default, but it’s very customizable and powerful. And Thunar (xfce file manager) is really good now.
Cinnamon
Another good option
it’s because of Infinity for reddit.
There’s a fork of infinity for Lemmy, called Eternity. Not sure if it’s usable now though.