Adriana Caselotti
Adriana Caselotti (May 6, 1916 – January 18, 1997) was an American actress, voice actress and singer. Caselotti was the voice of the title character of the first Walt Disney animated feature "Snow White and the Seven Dwarfs", for which she was named as a Disney Legend in 1994, making her the first female voice actor so named.
Billy Bletcher
He was most active as a voice actor. His voice was a deep, strong and booming baritone. Bletcher provided the voices of various characters for Walt Disney Animation Studios (Black Pete, Short Ghost and the Big Bad Wolf in "Three Little Pigs" and its spin-offs). He auditioned to play one of the dwarfs in Disney's "Snow White and the Seven Dwarfs" (1937). However, Walt Disney disapproved for fear that people would recognize Bletcher from the studio's Mickey Mouse and Donald Duck short subjects.