In celebration of NBC’s brand new horror series “Fear Itself”, here’s our selections for the top 10 scariest horror movies of all time. “Fear Itself” is styled as a showcase for small films from more than a dozen genre writers, including Joe Gangemi, Steve Niles and Dan Knauf, and genre directors including Brad Anderson (“The Machinist”), Darren Bousman (“Saw II, III and IV) and Ronny Yu (“Bride of Chucky”). “Fear Itself” premiers June 5 at 10 p.m. EDT. 1) The Omen (Directed by Richard Donner) Definitely the scariest movie of all time. A U.S. diplomat played by Gregory Peck and his wife adopt the infant Damien in Rome, then find…