I recommend these too:
Floyd Collins - about the trapped cave explorer and entrepreneur (cast album is on Spotify)[0]
Sunday in the Park with George - about an artist struggling to connect his artistic vision to the world (show is on YouTube, album on Spotify)[1]
Kiss me Kate - A group of actors put on The Taming of the Shrew - imo this is one of the greatest movie musicals ever made[2]
Musical theatre is a diverse and powerful medium, there's nothing else that has quite the same bandwidth to communicate emotion and ideas simultaneously
[0] https://en.wikipedia.org/wiki/Floyd_Collins_(musical)
[1] https://en.wikipedia.org/wiki/Sunday_in_the_Park_with_George