You left out King Vitamin >O
But from the above list, I've always been partial to Count Chocula...I mean, what's better than a vampire whose purpose it is to sell childrens' cereal? He's also the head of the Chocula/Frankenberry/Boo Berry trifecta, who are the most incredible of all cereal mascots because they're awesome even when it's not even close to Halloween, which is hard for a ghost and a frankenstein to be...