Here's my list (++ indicates more than 1):
Fitzgerald
Hemingway ++
Shakespeare ++
Christie ++
Brown ++
Dickens
McCarthy ++
Wodehouse ++
Steinbeck ++
Stoppard
Kafka
Conan Doyle ++
Seuss (of course) ++
Lee
A missing classic author is Robert Louis Stevenson - all his books are amazing, even 150 year later.If you've read more than one Dickens novel, you have my deepest respect.