Bernie Mac has to be on because the concept was so unique.
A different world because it revitalized the importance of black schools and gives us looking back a glimpse of the black excellence and pride of the late 80//early 90s
fresh prince up to season 4. After that, quality went down but that's my personal opinion.
Cosby Show for obvious reasons, even though…well you know. Showed the world that there were black upper class families who didn't c00n out.
Sanford and Son but I didn't understand the show until I was much older. Lamont Still a ham though.
Honorable mentions:
Wayans Bros
Thea
Smart Guy
The Hughley's (DL my favorite comedian)
Girlfriends