10. Billie Jean King

The former tennis champion famously beat Bobby Riggs in the 1973 "Battle of the Sexes" match, after the retired male champion claimed women's tennis was inferior to men's, and that he could beat a top female player even at the age of 55.

King — a vocal advocate for gender equality and social justice — was portrayed by Emma Stone in the "Battle of the Sexes" movie, released in 2017.