* William Faulkner: Faulkner is often considered the quintessential Southern writer, and his works like "The Sound and the Fury" and "As I Lay Dying" are known for their gritty realism and portrayal of rural Southern life.
* Flannery O'Connor: O'Connor's stories are set in the American South and explore themes of religion, morality, and the human condition with a stark realism and often dark humor.
* John Steinbeck: Though his works are often set in California, Steinbeck explored the lives of working-class people and captured the realities of their struggles, particularly during the Great Depression.
* Ernest Hemingway: While not exclusively regionalist, Hemingway's stories are often set in specific locations, like the Spanish Civil War or the American Midwest, and his writing style emphasized realism and a detached, objective perspective.
* Mark Twain: Twain is a master of regionalism, particularly in his portrayal of life on the Mississippi River in "The Adventures of Huckleberry Finn." While he often used humor, his writing also captures the harsh realities of life in the American South.
Ultimately, the term "realist and regionalist" can be applied to many writers, but these are just a few of the most prominent examples.