You missed one of the big ones i.e.
Vibrate: Market cap: 41M$
This is potentially a good product as it is still cheap and the ico has already passed quite a few months ago. This means a lot of development has been done and now it's about marketing and promotions. Worth getting some cheap coins, at least one of these music coins should succeed!
I thought about adding them to the list. But in my opinion they are very different. It's about live events and ticketing. The others are about selling/streaming music. Although I find Viberate appealing I think they will have a very hard time to scale. The spotify model is quite easy to scale as you can see there are a few international players. The ticketing system however is a very local business. I witnessed at least 10 startups in Germany alone during the last year trying to enter that market. It's a red ocean.
I hope Viberate succeeds nevertheless.