Leonardo da Vinci, Gustave Courbet, Tim Burton, Bill Watterson, Tex Avery, Jim Henson, and Claude Monet.
My favorite four may have to be...
Tim Burton: An Academy Award and Golden Globe-nominated American film director, producer, writer and artist, Tim Burton is famous for dark, quirky-themed movies. His is known for films such as Beetlejuice, Edward Scissorhands, The Nightmare Before Christmas, Sleepy Hollow, Corpse Bride and Sweeney Todd: The Demon Barber of Fleet Street, and for blockbusters such as Pee-wee's Big Adventure, Batman, Batman Returns, Planet of the Apes, Charlie and the Chocolate Factory and Alice in Wonderland, his most recent film, that is currently the second highest-grossing film of 2010 as well as the sixth highest-grossing film of all time.
Jim Henson: creator of The Muppets
Bill Watterson: American cartoonist and the author, Bill Watterson created the influential and admired comic strip Calvin and Hobbes. His career as a cartoonist ran from 1985 to 1995. Unfortunately, he stopped drawing Calvin and Hobbes at the end of 1995 with a short statement to newspaper editors and his fans. Watterson felt he had achieved all he could in the comic strip medium.
Tex Avery: American animator, cartoonist, voice actor and director, Tex Avery is famous for producing animated cartoons during The Golden Age of Hollywood animation. He did his most significant work for the Warner Bros. and Metro-Goldwyn-Mayer studios, generating the characters of Daffy Duck, Bugs Bunny, Droopy, Screwy Squirrel, Porky Pig and Chilly Willy into the personas for which they are remembered. Avery's influence can be seen in almost all of the animated cartoon series by various studios in the 1940s and 1950s. Avery's style of directing encouraged animators to stretch the boundaries of the medium to do things in a cartoon that could not be done in the world of live-action film. An often-quoted line about Avery's cartoons was, "In a cartoon you can do anything."