I have been really happy with Manjaro (the Gnome variant). Based on Arch (love the AUR), but easier to setup (more opinionated out of the box).
Honestly the dark theme of the Gnome variant is the most beautiful dark theme I have ever found for a Linux DE. I know there are lots of ways to tweak the various DEs to get some cool looking dark themes, but my experience is that they can take a lot of manual configuring and tend to still fail on the edge cases. The dark theme bundled with Manjaro Gnome looks amazing right out of the box!
Honestly the dark theme of the Gnome variant is the most beautiful dark theme I have ever found for a Linux DE. I know there are lots of ways to tweak the various DEs to get some cool looking dark themes, but my experience is that they can take a lot of manual configuring and tend to still fail on the edge cases. The dark theme bundled with Manjaro Gnome looks amazing right out of the box!