Jack Vance would head the list. Stephen King is up there. Bernard Cornwell, at least for his Sharpe's books. I like his new medieval series as well, but not the Civil War stuff. Whenever a new Flashman novel comes out I grab it right away. I watch for William Goldman's byline. And I confess to being addicted to Colleen McCullough's "First Man in Rome" series, despite the fact that she's an awful writer in some ways. Even so I find the books compulsively readable.