my favorite was the Count in these commercials. this was the very first one, dating from 1971. they sure worked well on Saturday morning viewers, me being a religious one of those. gotta love the vocal acting in these!
the Count and Frankenberry were the first two, and then they were followed by the ghostly Boo-Berry and the little remembered and poorly named "Fruit Brute". he didn't last long. naturally I sampled all the cereals, but it was always the Count I returned to. one of the few times I ever picked the vampire!