I remember having seen Blacula (1972) at some point, and I'm not re-watching it this month.
Youtube has it online:
Moria calls it "only a cheap B-movie with no greater pretensions other than exploitation." 1000 Misspent Hours says, "There are, as we shall see, some really groan-worthy moments in this film, but on the whole, it is a well-executed, imaginative, and intelligent movie." The New York Times offers a few comments but not a coherent review.