Which of these film stars has never won an Academy Award for Best Actor?

Sylvester Stallone (July 6, 1946) is an American actor and filmmaker. After his beginnings as a struggling actor for a number of years upon arriving in New York City in 1969 and later Hollywood in 1974, he won his first critical acclaim as an actor for his co-starring role as Stanley Rosiello in The Lords of Flatbush. Stallone subsequently found gradual work as an extra or side character in films with a sizable budget until he achieved his greatest critical and commercial success as an actor and screenwriter, starting in 1976 with his role as boxer Rocky Balboa, in the first film of the successful Rocky series (1976–present), for which he also wrote the screenplays. In 1977, Stallone was the third actor in cinema to be nominated for two Academy Awards for Best Original Screenplay and Best Actor. He didn't win.

Source: Wikipedia