“Because of Them We Can” Black History Month bulletin board ideas

Who are some lesser-known Black Americans that made medical, technological, social, etc. advances that changed history? I specifically want people that impacted life today. While I recognize there are tons of “first African-American to…”, I’d like to shine a light on “Thanks to them, we are now able to…”

I’m doing my own research, but thought some of you may know some off the top of your heads! All ideas welcome!