Mark Evanier points out this first commercial, in which Yogi Bear meets Big Otis, the supposedly herculean Scot pitchman for Kellogg’s OKs. Mark tells you the backstory, so just go read his bit for the whole shmeal, but suffice to say I’d really like David O’Hara’s character from Braveheart to take Otis’ place.
Of course, as Mark mentioned, the whole Big Otis thing didn’t work out so well, showing here:
Wait. Did he say “Proteans”?