Stanford Leonard "Stan" Smith is a fictional character and the title character protagonist of the animated television series American Dad!. He is voiced by the series' co-creator and executive producer, Seth MacFarlane. Stan is the patriarch of the Smith family.
Vote which fictional character would naturally fit in-universe with a big-named franchise! No time-travel, no interdimensional crap, no "Pooh's Adventures", they would just exist in-universe.
