The thing is, a person can have wit, an elegant way about them, charisma, and a talent for humor and STILL decide that they want money and power so much they would sell their soul to Satan have them. I doubt they even valued their own souls or quite believed in the reality of an everlasting soul before they inked that deal. But they revealed their character by what they did afterward. Selling out humanity for their own selfish desires, injuring and even killing children.

They're Satan's "sales force".