Kurt Vonnegut
John Steinbeck (I don't personally like him but lots of people do)
Mark Twain
Toni Morrison
Heres a list from my Honors American Lit Class:
1. The Adventures of Huckleberry Finn by Mark Twain
2. The Color Purple by Alice Walker
3. A Streetcar Named Desire by Tennessee Williams
4. Catch-22 by Joseph Heller
5. Invisible Man by Ralph Ellison
6. The Catcher in the Rye by J.D. Sallinger