There's definitely lot of music on Bandamp.
Bandcamp is a sort of Myspace, so can be considered to have a huge majority of fan/amateurs music.
Though & unlike Myspace, it's clearer and solely dedicated to music.
It's also providing a system to share/stream & sell directly music. The price is always choosed by the seller/owner.
So it's probably the best platform for cover bands / amateurs to distribute & sell their music in digital format.
But there's also a few known artists to be found there, like:
Howard Drossin,
Jake "virt" Kaufman,
Sam Hulick ...