The Curse of Frankenstein (1957): Terence Fisher is a master director and this, the first of Hammer's reinvention of classic gothic horror, proves why. Story, performances and, oh, those colors are stunning.
Horror of Dracula (1958): Perhaps Hammer's finest hour, this is the best Dracula film ever. Great cast, direction, photography, costumes, etc. And the music by Hammer veteran James Bernard is terrific--it really gets your blood pumping. Oh, and Lee and Cushing truly strike sparks.
The Mummy (1959): The third in Hammer's fantastic Lee/Cushing Gothic re-imaginings. Chris Lee is the best mummy. Like his interpretation of Dracula, Lee is dynamic and forceful--and he does this with absolutely no dialogue!