Real (in no particular order): William Van Alen, the architect of the Chrysler Building; John Rockefeller; Howard Hughes; Calvin Coolidge; F. Scott Fitzgerald; Amelia Earhart; Edward VIII; Winston Churchill... It's hard to pick one!
I second the hurcule poirot, I adore theda bara and louise brooks, I love love love the silent film era and 20's jazz babies! I also love louis armstrong, ( I'm from new orleans it's like a requirement!) and Ella fitzgerald.
Mine're a combination of artistic, cinematic and fictional.
Aleksandr Rodchenko, Sergei Eisenstein, the guys who started the Art Deco and Streamlining movements, Big Daddies, the artists for the 90s Batman animation, Batman himself, Modernist artists (Bauhaus etc), Sky Captain, the Shadow, Bela Lugosi, Boris Karloff, Vincent Price (and Tim Burton to an extent), Fleischer Brothers, League of Extraordinary Gentlemen, H.P. Lovecraft
He published more than thirty books, inventing and popularizing terms such as "Spaceship Earth", ephemeralization, and synergetics. He also developed numerous inventions, mainly architectural designs, the best known of which is the geodesic dome. Carbon molecules known as fullerenes were later named by scientists for their resemblance to geodesic spheres.