Seconding PowerAmp. Tons of features, something I loved about Spotify that PowerAmp has, you can queue songs and do things like “play next” so that it inserts songs into your queue.
You can also see what song is going to play next, though I still deeply desire a mobile version of the Winamp feature where you can see the entire list of how the songs are shuffled and everything that’s coming up
What do you mean by paywalls? I got off reddit when the whole paying for API by third party apps thing happened and don’t know what’s going on after that point