According to Charmin makers Procter & Gamble, a 1978 survey found that "Mr. Whipple" was the third best-known American, behind only recently-ousted President Richard Nixon and evangelist Billy Graham.
And now they're all gone.*
From TV Acres:
Prior to his Charmin involvement, [Dick] Wilson had been a stand up comic, stuntman, acrobat, and a movie actor. Dick's Mr. Whipple character gave him such a high profile that his career in movies was basically over. After all who wants to see Mr. Whipple kissing or killing somebody. Wilson's TV credits included the role of a local drunk on BEWITCHED for nine years; a cop on THE MUNSTERS; Colonel Gruber on HOGAN'S HEROES; and Dino Baroni on MCHALE'S NAVY.
*I know. Just kidding.