Some of these authors also have some great essays and non-fiction work.

20th-21st CENTURY:

Douglas Adams
Donald Barthelme
Raymond Carver
Albert Camus
Raymond Carver
Don DeLillo
Philip K. Dick
William Gibson
Nikolai Gogol
Franz Kafka
Vladimir Nabokov
George Orwell
Thomas Pynchon
Philip Roth
George Saunders
Kurt Vonnegut