Frank Lloyd Wright was always the first one on the list, (June 8, 1867 – April 9, 1959) He was an American architect, interior designer, writer and educator, who designed more than 1,000 projects, promoted organic architecture and developed the concept of the Usonian home. His work includes original and innovative examples of many different building types, including offices, churches, schools, hotels, and museums. Wright also often designed many of the interior elements of his buildings, such as the furniture and stained glass. His style an architecture that evolves naturally out of the context, most importantly for him the relationship between the site and the building and the needs of the client.
Wright was recognized in 1991 by the American Institute of Architects as "the greatest American architect of all time".
He is mostly famous for Fallingwater