I use all the above desktops - yes I'm a Windows 7 and 10 user as well as a Linux guy - and for people I think Mint 17.3 makes a great desktop. In fact, it's a great desktop operating system period. Linux Mint 17.3 is a great replacement for Windows 7.
Specifically Linux Mint 17.3, Rosa, with the Cinnamon desktop. My buddy David Gewirtz recently wrote about the question of whether you should move from Windows 7 to Windows 10 or a Mac.
