On the topic of MAD, they actually didn't create the Alfred E Neuman design
The image of this empty headed gap toothed fuckhead predates the magazine by at least half a century and was commonly used for ads, postcards, and shit like picrel
IIRC nobody actually knows who made it, but this guy who made one of the earliest known versions sued EC, but the courts ruled that since he had let so many other people use it and I think didn't publish with a notice he actually lost
That is of course assuming he was the original creator