This website — everynoise.com — appears to have every possible genre of music imaginable.. Well, 1536 right now.
Click on one and you can hear an example. Click on the “»” on that example, and you’ll see another map of artists. A fun place to explore and discover.
According to the site creator,
“down is more organic, up is more mechanical and electric; left is denser and more atmospheric, right is spikier and bouncier.”