The first person that comes to my mind is Hilary Clinton. She was, until her recent stomach virus and subsequent concussion and brain trauma, an evil woman. She was highly ambitious and capable. She ran for president and if Obama hadn´t been as solid a contender as he was, she could have beaten him and emerged victorious.
Why do I say she is evil? Let´s think about it. She stood by her husband in the Monica Lewinsky scandal without reacting against him. Perhaps that is not the case and if it is, please excuse my misinterpretation, but as I saw it, she passed off the affair and carried on as if nothing happened, stayed loyal to Bill Clinton, even defended him and forgave his actions.
She did all this because she wanted the public to adore her, to enhance her image and give the people what they wanted, a figure they could look up to, while very subtly and gently burring a highly embarrassing and immoral event.