Is there a way to get recommendations for "underrated" songs, or music that is awesome but I might not come across? For instance, I really loved the Peacemaker soundtrack...
...but how would I have been exposed to that music without the show?
How would I find music that I'll possibly love, but I won't be exposed to?
Many, perhaps most, music services have towards the bottom of an artist page a list of similar artists that you can explore. Also, if you see what compilations a song, or an artist, is on you can see what else is on that collection.
Also, music services have collections for different styles of music. As you listen to those, if you like a song you can try to see if you like other songs from the same group / artist.