
I know what you're thinking. Barton Fink, right? Well, whereas that's one of my favorite Coen brothers movies (and if I were to rank their films, it would end up near the top) I don't think any movie that won the Palme d'Or could be considered "underrated." Mostly unwatched, sure. But underrated? Naw.
How about The Hudsucker Proxy? Well, while I do enjoy that picture, and feel that it's underappreciated, I wouldn't call it underrated, either. With a 60% Rotten Tomatoes critical score, I think it's perfectly rated.