I use Jellyfin [0] server on pi with tailscale, So I can access all media anywhere (DLNA also), and I can use DAC for high-res music (Android: USB Audio Player Pro [1]) as well.

[0]: https://jellyfin.org/

[1]: https://play.google.com/store/apps/details?id=com.extreamsd....

Navidrome (Subsonic/Airsonic server) with Symfonium Android app.

Subsonic server with play:Sub as a client. Nice and lightweight.

Plexamp is great. Even has built in EQ so I can use autoeq profiles on iOS etc. Reminds me a lot of Winamp of old.

If plex amp gets rid of its 1000 songs limit, Im in, too. I am very happy with syncthing+powerAMP setup on android.