Ava Gardner
Ava Gardner had such a strong South Carolinian accent that MGM found her incomprehensible. Nonetheless, she kept working and struck gold when she appeared in The Killers. She enjoyed half a century in the industry until she died of pneumonia in 1990.
Hedy Lamarr
Hedy Lamarr is not only iconic for being the first person to depict female orgasm on film, but she also worked on “frequency hopping”. This was a technique used to solve radio signal jamming to intervene with submarine-controlled torpedo. She got it patented, and it is now used by the military as well.