Off the top of my head I would have included The Thing, The Shining, maybe Poltergeist. Something more modern... 28 Days Later.
One film I would NOT include is Hostel. Especially at #2. Yikes. I hate that movie. It launched that whole "torture porn" segment of modern horror films that ruined the genre for the last several years. In addition to that is that it wasn't even scary. It was just gross-out gags from the halfway point to the end. The only think it got right was the gratuitous nudity. I like Eli Roth the person (he's very passionate about film if you ever see him in interviews/commentaries), but not a big fan of his movies.