In addition to the good distro options mentioned, there's also Debian Stable:

https://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/d...

There are several options for desktop environment, and you can select which ones to install when you boot that installer image (and also add/subtract more later, and change your preference at login time).

One of the nicest-looking ones that should be self-explanatory to use (for anyone who's used any version of Microsoft Windows since 95) is Cinnamon. Most of other desktop environments default to similar, except for the current default Gnome one, which is a bit more creative in a way that's not intuitive.