The original Dracula with Bela Lugosi from 1931. He was the perfect Dracula and he loved that role - so much so, that he was buried in the costume at his request. With his tall lanky frame and pale complexion, booming baritone voice and hypnotic, piercing stare. His son said he loved that role, bless his soul for forever.
When this movie was shown in the theater, women fainted in the aisles and grown men ran screaming from the theater. Its power of suggestion was unrivaled. Dwight Frye gave a brilliant underrated performance as Renfield, Dracula's clueless victim and business partner who lost his sanity and his life.
My other favorite is Carnival of Souls from 1962. Candace Hilligoss plays Mary Henry, a church organist who takes a job at a church in Utah. She becomes the lone survivor of an accident and when she comes back, she has terrifying episodes in which no one can see or hear her.
She is obsessed with an old abandoned carnival building where the spirits of the dead gather. As she walks the line between the world of the living and the dead, she is haunted by a specter who wants to take her back to the spirit world. The surprise twist ending is shocking and surpasses the stiff wooden acting. Eerie organ music score.
I also consider Nosferatu from 1922 to a brilliant cinematic masterpiece. When I first watched it, I thought, "Wow, no wonder people love this movie." The forerunner of Dracula. And wow, a classic from the very birth of the motion picture industry! I love it!
Gotta mention one more: a slick film called Vampyr from 1931. About a tourist who discovers that a small town is controlled by a vampire. It has very little dialogue even though it's on the threshold of talkies because they were trying to save money. But this movie doesn't lack in quality. It's rather tightly woven together. Vampyr is also unusual because the director preferred to not work with celebrities so he pulled people off the street for roles. Vampyr's cast is composed of a Polish doctor, a Russian journalist and a French housewife. They all did a terrific job.