Mortimer Leav (July 9, 1916, New York City, New York – September 21, 2005) was an American artist best known as co-creator of the influential comic-book character the Heap, and for his advertising art, which included some of the earliest TV commercial storyboards — among them, for Procter & Gamble's venerable Charmin bathroom-tissue character, the grocer Mr. Whipple.