Yale Gracey

Disney Imagineer, writer, and layout artist for many Disney animated shorts, including classics such as The Three Caballeros and Fantasia. Gracey joined the company in 1939 as a layout artist for Pinocchio. He designed many of the special effects for the Pirates of the Caribbean and Haunted Mansion attractions at Disneyland. The Haunted Mansion character Master Gracey was named in homage to him. Gracey retired from the company on October 4, 1975. -Wikipedia