Thanks for bringing up Melville. :p I think he's trash. No one paid attention to him until he was adopted as a hero among the Jazz Age literati, and since then no one has questioned that he's a "classic," but I think he ought to have been forgotten at the bottom of the dump heap.
Kafka I like well enough, but his writing strikes me of amateurish at times. I would catagorize Kafka as a "pleasant read" for the more morose of us.
I would also add to the list the name of Thomas Hardy. Don't know that he's held in especially high esteem, but I wouldn't recommend him to anybody, even for light bedtime reading. Absolutely dripping with the melodramatic contructs of his day.
