Forgot to also mention:

• full equaliser compatible with thousands of preset profiles for whatever headphones you have
• android auto
• programmable default actions (like touching a song either plays it or queues it)
• multiple queues - each time you manually start a track / playlist a new queue is created and you can swap back and forth between queues as you wish.
• ACTIVE DEVELOPER!! - Tolriq the dev is always updating it and very active in the community, they just want to make the best music player possible

Like the other guy said, Symfonium is the one and only true answer.

Quick rundown of features:

• playlist sorting
• smart playlists (auto generated by filters)
• fully customisable now playing screens
• fully customisable home menus
• casting via UPnP (think sonos, any other wifi enabled speaker ecosystem)
• stats tracking
• scrobbling to your tracking service (listenbrainz, lastFM)
• transcoding support (depending on server - jellyfin cant but navidrome transcodes perfectly)
• smart queue
• personalised mixes
• radio mixes
• downloadable media for offline play
• track / album rating system
• favourites

Symfonium does things that no other media player I know of can do, for example:

I try to rate my music as i listen to it and while I do that, every song i rate 5 stars goes to an automatically generated playlist of 5 star music only. From there it auto downloads to offline cache in OGG OPUS 320 format to keep quality and reduce space used (My library is all FLAC).

From there I have created a playlist that incorporates the 5 star playlist with some other parameters to create an even larger playlist which, you guessed it, is all automatically done for me.

Now I could have a bunch of these playlists combined in different ways (rating defined, mood defined, genre defined, BPM defined) and I can choose to either shuffle them when pressing play, start a personal mix which uses your stats to alter the queue of the playlist or I could order the whole thing by increasing BPM or year.

It is an incredibly powerful tool to listen to your music and I will never be able to go back to spotify playlists or any sort of algo picking what I listen to.