I've wanted a music player like the early versions of iTunes for a while, and this looks like it might fit the bill.
Those who've only known Music.app and later iTunes versions might be surprised to learn that there was a time when iTunes actually had a clean, intuitive UI: https://www.versionmuseum.com/history-of/itunes-app
Swinsian was the only Mac music player I could find that could come close to replicating my old MusicBee setup. The license fee was annoying but I paid it anyway and have no regrets.