Hemingway- For Whom the Bell Tolls, and Green Hills of Africa

Burgess- A Clockwork Orange

Orwell- 1984, Burmese Days

McCarthy- All the Pretty Horses, Blood Meridian, No Country for Old Men

Melville-Moby Dick, The Confidence Man


Any of these:http://www.modernlibrary.com/top-100/100-best-novels/