Fame is fleeting.
Maybe Irene Cara. Just my guess.
Irene who?
OP said "famous", not once somewhat known but now forgotten for decades.
Only forgotten by Neanderthals.
Baby didn’t remember their names
Paul McCrane had a nice career with bit parts in Shawshank, RoboCop, 24. and several others and a starring role in ER for seven seasons as Dr. Romano.
Debbie Allen and Anne Meara are famous.