…is Stan Smith based on Robert Z’Dar?

Robert Z'Dar and Stan Smith standing back-to-back
Robert Z’Dar in Maniac Cop and Stan Smith from American Dad

(I couldn’t find any information about Seth MacFarlane specifically basing American Dad‘s Stan Smith on Robert Z’Dar—especially in Maniac Cop—but the similarity is obvious. I have seen Family Guy mention Robert Z’Dar, so he definitely knows about him, but that that doesn’t prove anything, maybe he became aware of Z’Dar after someone pointed out Stan Smith’s similarity to him later.)