Sunday is Monkey Covers day here at YACB. Because there's nothing better than a comic with a monkey on the cover!
"I Am the Gorilla-Man" on the cover to Tales to Astonish #28, by Jack Kirby & Dick Ayers (1962).
(Standard disclaimer about mad scientists who turn into gorillas not really being monkeys applies.)
Image courtesy of the GCD. Click on the image for a larger version.