I also still use “iTunes” (it’s called simply “Music” now on macOS since they limited it to music now). I looked around and I didn’t find – at least for Mac – any alternative that let’s you manage a collection as conveniently and with custom playlists and such. Lots of player are just very limited. For inbetween quick lisitening I either play single files directly via the Finder or use VLC.
(or rip CDs, now mostly with EAC, since I have noticed that iTunes is a terribly unreliable ripper)
It can work well but I also use another tool named XLD (X Lossless Decoder). I also use lossless because if I do that work of importing I want to do it properly once 😉