Well, I have to say that Harmonoid is the best one I’ve found, it has a ton of cool features, it works and it allows you to be able to see your collection by album and it doesn’t use Electron. Right now its development has stalled a bit but it’s still pretty much in good shape, though.
I’ve been using PlexAmp for a long time, but I’ve had a lifetime subscription to Plex for several years now. They have versions for Linux and a headless version you can run on a Raspberry Pi (this one still requires PlexPass).
Jellyfin for FOSS, plex fork