Pennywise- Tim Curry
In the original It, Tim Curry put on the clown makeup and got to work. He wore a special headpiece to give his head an enlarged shape, but the rest was simply makeup. It's hard to compare the new-age Pennywise to the old one since they're so different and scary in their own unique ways!
The Strangers
The Strangers is based on the real Keddie Cabin murders (even though the director has never said so, it's glaringly obvious). A group of people break into a cabin and begin to wreak havoc on a family. They wear masks the entire time, which only dehumanizes these people and makes them even scarier.