* F. Scott Fitzgerald: Their careers overlapped significantly, both writing during the "Jazz Age" and the 1920s. They were also friends and rivals, with their works reflecting the themes of disillusionment, wealth, and the American Dream.
* William Faulkner: Though Faulkner's style was distinctly different, he also dealt with similar themes of loss, identity, and the American South.
* John Steinbeck: Both Hemingway and Steinbeck became known for their realistic depictions of American life and their strong protagonists.
* John Dos Passos: Both Hemingway and Dos Passos were part of the "Lost Generation," a group of writers who experienced the devastation of World War I and its impact on American society.
* Thomas Wolfe: While their styles diverged, both Hemingway and Wolfe wrote about individual journeys, exploring themes of self-discovery and societal critique.
It's important to note that this is not an exhaustive list, and there are many other American authors who were writing during the same period. These authors, however, are some of the most prominent and share certain themes and stylistic elements with Hemingway's work.