These are my favorite black and white monster movies. Upon recent re-watch they actually hold up pretty well.
There may be some I have forgotten, so please feel free to make suggestions.
A film crew goes to a tropical island for an exotic location shoot and discovers a colossal giant gorilla who takes a shine to their female blonde star. He is then captured and brought back to New York City for public exhibition. (100 mins.)
The Invisible Man
A scientist finds a way of becoming invisible, but in doing so, he becomes murderously insane. (71 mins.)
Bride of Frankenstein
Mary Shelley reveals the main characters of her novel survived: Dr. Frankenstein, goaded by an even madder scientist, builds his monster a mate. (75 mins.)
Creature from the Black Lagoon
A strange prehistoric beast lurks in the depths of the Amazonian jungle. A group of scientists try to capture the animal and bring it back to civilization for study. (79 mins.)
Invasion of the Body Snatchers
A small-town doctor learns that the population of his community is being replaced by emotionless alien duplicates. (80 mins.)
A scientist has a horrific accident when he tries to use his newly invented teleportation device. (94 mins.)