There is a pretty good chance Mozart and Beethoven were black

Uh, about that, you may want to reconsider. We so far have not yet had any threads addressing the ethnicities of Wolfgang Amadeus Mozart or Johann Sebastian Bach, so you'll have to wait for a proper answer to those. However, Ludwig van Beethoven is most assuredly not black. I commend to your attention these previous posts:

• u/erus addressed this six years ago, and also pointed out that Beethoven had a contemporary who was black;
• and u/DGBD has a post on this matter the last time it flared up.