Pulp Fiction was an entirely original script, albeit obviously heavily influenced by an entire genre of books and film. You can't pinpoit a single novel though. Disney owned Mirimax handled that one. If thats big-hollywood enough for your criteria, it's an exception. But I can't think of many others, so you have a point. But originality in idea is relatively impossible, so originality and skill in execution is the key. Some directors still achieve that, even in the mainstream. Best point in case, The Matrix, so obviously ripped off so many different films and books, yet executed the ideas in a way never quite seen before. The quality of the total package is far more important than the story's basic origins. Can you call Kurosawa's Ran a bad film because it was an adaptation of King Lear? Hell no. The Godfather? No Country for Old Men? Blade Runner? I don't care if hollywood is original, I care if they have quality. And horror remakes are notorious for being trash 9/10 times, and that's one of Carpenters best films.