In Western G1 continuity, Defensor is probably the sanest of the robots generally considered to be gestalts. Predaking is also a great meld of his component parts. Computron isn't stupid, but he's just so intelligent that he analyses every move to the tiniest minutia which makes him appear slow and behave slowly. Monstructor has an Intelligence rank of 5, but beyond that he didn't really get much facetime in the 80s. The rest of the main G1 gestalts (Bruticus, Devastator, Menasor, Superion and Piranacon are either dumb or psychologically unstable.)