My project has stalled, but there was a point when I was putting together a Wikipedia page for notable composers of the 20th and 21st century. I came up with some criteria that would filter out most of the composers listed on their respective "list of 20th century composers" and "list of 21st century composers". If you haven't seen these lists, they are HUGE and thus pretty useless IMO.
I started going through each composer and so many of them were unknown, barely sourced/dead sources, no website, no music online, recently graduated college, etc.
I flagged a handful of pages and all of them were rejected for deletion. Sometimes the page creators popped out of the blue and fought me on it (and got to vote on the page remaining). I think someone of them had direct connections with the composer.
There are so many tiny pages dedicated to forever-invisible composers, it's awful.
You can see my progress here:
https://en.wikipedia.org/wiki/Draft:List_of_20th-_and_21st-c...