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.
Moroni Olsen
His most famous role was the voice of the Slave in The Magic Mirror in Walt Disney's "Snow White and the Seven Dwarfs" (1937). Olsen also provided the voice of the senior angel in "It's a Wonderful Life".