He isn’t really an artist, but there is no evidence of an artist that worked in the fine arts before becoming a straight photographer. Instead, most of the credit for straight photography and being famous in it goes to Alfred Stieglitz. Stieglitz was an American-born photographer. He got his start in a photography business that barely ever made a profit because of a high wage paid to the employees and lower commissions than most other companies took when doing photography.
For those unaware of what straight photography is, it’s basically photography that has a lot of clarity, a sharp focus, and little cropping. It basically takes the photograph and elevates it artistically, without taking any of the original photograph away from the final product.