I am not familiar with Lewis ....
but your other two choices are way off base. Dreiser and Wister are two well recognized American authors writing about unrelated subjects. 'Sister Carrie" and 'An American Tragedy' are examples of early 20th century realism and are very good reads. Owen Wister's 'The Virginian' is one of the best renditions of the life of the American cowboy and has been made into many movies and a television series. You are from Wales, I see; perhaps you don't understand these authors of Americana, or you may be very young and not be able to digest such novels as of yet.
But to cast a vote, I vote for Parson Weems, the author of the "Life of George Washington", who promoted the apocryphal 'toss of the silver dollar' or 'the chopping down of the cherry tree'.
I would suspect that those who voted for...
Owen Wister, Theodore Dreiser, Kafka, just are either nor interested in the subjects these writers pursued or were just not up to digesting their style. The Virginian, An American Tragedy, and The Trial are certainly three books which should be on everyone's reading list. Also, The Jungle (Upton Sinclair) should be read by most everyone.
With that said, the writer who I definitely didn't enjoy Is Virginia Wolf. To the Lighthouse and Orlando are just not my cup of tea, but this doesn't mean she wasn't a good writer.