In The Wizard of Oz (1939), Frank Morgan portrays 5 characters including The Gatekeeper, The Coachman, The Guard and The Wizard. He is literally gate keeping himself and is so touched by
L. Frank Baum's the Wonderful Wizard of Oz - IMDb
Hear me out: why Return to Oz isn't a bad movie, Movies
The Wonderful Wizard of Oz: What the Movie Got Wrong
The GLARING Error in 'The Wizard of Oz' That Filmmakers Hoped You Wouldn't Notice - Woman's World
The Wizard of Oz' should have been a disaster - Deseret News
Why Are There So Many Wizard of Oz Sequels, Prequels, Remakes and Spinoffs?
Understanding the Deep Wisdom of The Wizard of Oz, by Anthony Hinko
Shocking Facts About The Wizard Of Oz Movie And Actors
The Wonderful Wizard of Oz' was influenced by the woman's suffrage movement - Times of India
16 Shocking Wizard Of Oz Movie Facts