From 1987, Brian Bolland features Congorilla on the cover of Swamp Thing Annual #3. Rick Veitch's story "Distant Cousins" not only features the golden ape, but also Gorilla Grodd, Angel & The Ape, and other various primates from the DC universe.
(standard disclaimer about gorillas not really being monkeys applies)
Image is courtesy of the GCD. Click on the image for a larger version.
