Suggestions by @ringothedrummer

Superman (1978 film)

as Superman Movies in Superman Reference Bank

Idris Elba

as Darth Vader in Star Wars

Stephen Merchant

as C-3PO in Star Wars

Hiroyuki Sanada

as Ben Kenobi in Star Wars

Pedro Pascal

as The Joker in Batman: The Movie

Adam Sandler

as “Funky Flashman” in The New Gods

Spoiler

as “Funky Flashman” in The New Gods

Kingsley Ben-Adir

as Metron in The New Gods

Kate Kennedy

as Stompa in The New Gods

Grace Van Dien

as Gilotina in The New Gods

Fiona Dourif

as Mad Harriet in The New Gods

Rina Sawayama

as Lashina in The New Gods

Monica Bellucci

as Bernadeth in The New Gods

Edward Norton

as Glorious Godfrey in The New Gods

Emma Mackey

as Grail in The New Gods

Pilou Asbæk

as Kalibak in The New Gods

Tom Waits

as DeSaad in The New Gods

Jean Smart

as Granny Goodness in The New Gods

Stellan Skarsgård

as Darkseid in The New Gods

Michael Wincott

as Mighty Steppenwolf in The New Gods