Suggestions by @maxcarter

Lucille La Verne

as Georgia in The Little Engine That Could 2 Return of the Railroad (1945)

Paul Robeson

as Pete in The Little Engine That Could 2 Return of the Railroad (1945)

Charley Grapewin

as Jebediah in The Little Engine That Could 2 Return of the Railroad (1945)

Boris Karloff

as Farnsworth in The Little Engine That Could 2 Return of the Railroad (1945)

Lionel Barrymore

as Tower in The Little Engine That Could 2 Return of the Railroad (1945)

Dickie Jones

as Chip in The Little Engine That Could 2 Return of the Railroad (1945)

Judy Garland

as Tillie in The Little Engine That Could 2 Return of the Railroad (1945)

Tom Trench

as Lon Chaney in Characters golden age stars could have played

Walt Disney

as Producer in The Hunchback of Norte Dame (1946)

Oliver Hardy

as Oafish Guard in The Hunchback of Norte Dame (1946)

Stan Laurel

as Brutish Guard in The Hunchback of Norte Dame (1946)

Clarence Nash

as Baby Bird in The Hunchback of Norte Dame (1946)

Charlie Chaplin

as Gypsies in The Hunchback of Norte Dame (1946)

Edward Everett Horton

as Guards in The Hunchback of Norte Dame (1946)

C. Aubrey Smith

as Archdeacon in The Hunchback of Norte Dame (1946)

Clara Blandick

as Laverne in The Hunchback of Norte Dame (1946)

Claude Rains

as Hugo in The Hunchback of Norte Dame (1946)

Lionel Barrymore

as Victor in The Hunchback of Norte Dame (1946)

Gary Cooper

as Clopin in The Hunchback of Norte Dame (1946)

Cary Grant

as Captain Phoebus in The Hunchback of Norte Dame (1946)