I know that Bruce Wayne and Superman's appearances were both based off of Douglas Fairbanks, Joker's look was inspired by Conrad Veidt in The Man Who Laughs, and Gil Kane modeled Hal Jordan after Paul Newman but what other characters' appearances were inspired by real life people?
Other characters based off real people:
John Constantine - Sting
Wonder Woman - Elizabeth Martson and Olivia Byrne
Dream - Robert Smith
Death - Cinamon L. Hadley
Destruction - Brian Cox
Clark Kent - Harold Lloyd