Stan Smith from American Dad! might not be as iconic as Family Guy’s Peter Griffin, but one key element makes him the better character. Family Guy was Seth MacFarlane’s first adult-oriented animated series, establishing his darker, raunchier take on the formula popularized by The Simpsons. When American Dad! premiered, it was dismissed by critics as a Family Guy clone. However, the series has since developed its own voice, finding the humor in its characters and situations as opposed to Family Guy’s trademark non-sequiturs and cutaway gags. Now, MacFarlane's second series is widely considered to be the superior one.
https://screenrant.com/american-dad-stan-family-guy-peter-character-better/