Bill Murray and Sigourney Weaver
Ghostbusters was a firm favourite of mine 
I always loved how sharp and hilariously sarcastic Bill Murray was in his roles. Always a bit of a cocky twat, but a clever and funny one 
Sigourney Weaver just oozes understated charisma. Same with the already mentioned Alex Polizzi. Not necessarily conventionally beautiful, but both incredibly attractive.