Debian XFCE 8.4.0 netinst24 Apr 2016
It’s Debian meaning it takes some configuring and the packages are a bit behind but it is rock solid.
Debian XFCE 8.4.0 netinst
Building it from the netinst keeps it light and lets you set it just the way you want. If you’re willing to put in a little time to get it working the way you want, it is great. I run my server on it because I want things to work without needing fixes and tweaks.