Well there's an old kid in town, MPC-HC is still being maintained[1] to the great joy for us who dislike the VLC UX.

[1]: https://github.com/clsid2/mpc-hc/

mpv is really good but a little light on the GUI; I recommend VLC for most people

PotPlayer is the new kid, I guess? Personally I don't like VLC because of the UI, so I've always used MPC.

MPC is better if you're on Windows.