He's never had quite the wide net that Snoop has had (films, etc.), but as one of the last remaining visible and important of the first generation of electric bluesmen, he's become an integral (and bankable) part of Americana... his name is on a chain of rock clubs, and at 86 he's STILL doing ads:

http://www.youtube.com/watch?v=l5tpXWlXZoo&feature=player_embedded

I may go to hell for pointing it out, but it's somewhat ironic that his diabetes ads come at the tail end of an advertising career which included earlier stints for both McDonald's and Burger King. And how about this one that looks like it's from about 1980? http://www.youtube.com/watch?v=7gGB0ZWusgA&feature=related

I'd like to see if Snoop is still doing ads at 86.