I gotta go with the underdog Caroline Bliss here in the upset. She is only in two of the films and heck, she is hardly even in one of them, but she, yes probably because she is younger, is the most attractive of the three in my opinion. But on top of that, it seemed like her character was more involved than the other two, did more than secretarial duties. Lois is a classic, and like you say 'noff, Samantha plays her scenes brilliantly. I really like all three.