Not a "horror" movie or "monster" movie per se, but I have to go with "Night of The Hunter" with Robert Mitchum as the preacher. Might be dating myself with that one, since I saw it when I was still a kid .... sometime ago, I must say. Of course, the "Hunchback of Notre Dame" Charles Laughton version would fit right in there. Still see it now and again on late late night/early morning TV. Larry F PS: Modern day, I'd have to go with the first encounter in the very first "Alien!"