Perhaps this will be unpopular, but it was all Raul Julia. He definitely out-Gomezed John Astin, but Carolyn Jones was something else.

I don’t mean to sleight Anjelica Huston, but it would be difficult to fail working opposite Raul, and Carolyn Jones was frequently the one carrying John Astin in the series.

Not to speak ill of Astin either, because he was good, but he played it differently