Henri Rousseau
Roy Lichtenstein
Georgia O'Keefe
Rembrandt Van Rijn
Albert Bierstadt
Paul Detlefsen
Frederic Church
Grant Wood
Norman Rockwell
Winslow Homer
James McNeill Whistler
Daniel Beard
C.W. Anderson
Photorealism
This post is referenced in the book GLIMPSE The WORLD: A Whirlwind Tour of and Lightning Reference to 200 Nations, from Afghanistan to Zimbabwe, which you can find here.