I'd recommend either OpenSuSE or Fedora, both with KDE. They're big, well supported distros, which should install without issue and provide a slick modern experience. I use OpenSuSE, as I find the YaST system tools convenient and user friendly.
I'd avoid Ubuntu, multiple issues. Mint is a good distro but I think any big mainstream distro "just works" now, so I'd go for something that uses a slicker desktop. I prefer KDE, which is available on Mint but just isn't as tightly integrated as their own Cinnamon desktop.
