The desktop that has the maximum number of core developers - including kernel, desktop, ux and userland is Fedora. And it shows.
Meh... and this army of developers still hasn't figured out how to ship a distro with a proper font rendering. Having to do [1] is insane. And every time you bring this up, there's always "looks fine to me" or "a matter of taste" argument. Nope it's not. [1] https://www.reddit.com/r/Fedora/comments/5ea3bx/font_renderi...
Fedora is actually pretty strict about free software.
Also you can check out Fedy which makes those steps much easier.