Brand mascot you have nostalgic affection for regardless of the evils of capitalism
Non-horny, stretching the definition of mascot: The SoBe lizard. Simple, effective, 90s cool, god I miss those drinks, iconic
Non-horny traditional mascots: Toucan Sam and Trix the rabbit. It worries me I can't recall any non-cereal ones, but when I set aside the anticapitalist reading glasses, I liked that they had a narrative and a bit of goofiness, it was fun in a way I don't think mascots are now.
Honorable Mention: we all loved Captain Crunch, and part of me still does, but since the Navy declassified recwntly what he did in the seventies it's tainted my view of the old sailor.
Horny: Tony the Tiger. He could probably bench press me and I want him to try. Mmmmm-mmmph, frost me like those flakes, sports daddy.