About Roy Krenkel
Roy Gerald Krenkel, who often signed his work RGK, was an American illustrator who specialized in fantasy and historical drawings and paintings for books, magazines and comic books. His enlistment papers of January 23, 1942, record him as living in Queens, as having graduated from high school, and as single, without dependents, employed as an actor. During the late 1960s, he created cover paintings for DAW Books and Lancer Books. He also created preliminary roughs which Frazetta modified and used when he painted covers for Warren Publishing's Creepy and Eerie.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.