The beauty inside, they're not bad people and they're shown to have good friendships but they are not the warmest people and you wouldn't wanna find yourself on either of their bad side. All in all, they form a pretty intimidating, cool, power couple.
Summer's desire (the 2010 version), especially in the second act (around the 3rd episode I think) when they're all grown up. There's two MLs and one FL and all of them are more or less cold and calculating.
The Good Wife (korean version) ; everybody and their daddy (litterally) is some kind of lawyer or politician. It's not they are cold per say, they're just very careful, deliberate, smart and calculating. This is a remake of a US show and I liked the US version better, except for the husband; in here he is much more cunning than in the original.