I stumbled on this algorithmically-generated chart (using Spotify) of 21st century composers - all the names can be clicked on to hear samples of their music. http://everynoise.com/engenremap-american21stcenturyclassical.html It looks like a fun way to explore the current world of New Music available on Spotify.
“This is an ongoing attempt at an algorithmically-generated, readability-adjusted scatter-plot of the musical genre-space, based on data tracked and analyzed for 1961 genres by Spotify as of 2018-08-31. The calibration is fuzzy, but in general down is more organic, up is more mechanical and electric; left is denser and more atmospheric, right is spikier and bouncier.”