My take on this issue is that this sounds like a Musicbee promotion :p
How can a player that allows you to almost completely design your own UI be "clunky and clumsy"? foobar2000 can be anything from an unscrollable auto-generated playlist of "odd numbered tracks in the deathmetal genre" showing only "stop" and "play" buttons, to a dynamic / responsive UI that auto-scrolls song lyrics in time with the song that's playing.
If you don't like it, you don't like it and that's fine. Reading "clumsy" and "clunky" used to describe foobar2000 make me wonder what your approach to evaluating music players even is though.
Take this as a suggestion to give foobar2000 a little more time/effort. If you just aren't into that though, I'd say Clementine is pretty solid.
If you add an edit to your post listing out your requirements, dealbreakers, and maybe giving a little detail on what you didn't like about the players you listed, you'll probably get responses that are more helpful :D