4. Olivia Pope (Kerry Washington)
Do we really have to break this one down at all? OK, fine.
The only thing that differentiates Olivia from her dad is her humanity. Yes, Olivia is a "gladiator," and helps people fix things, but let's not get it twisted. In the process of "fixing" things, she does some pretty questionable things too.
Olivia isn't entirely evil, but she's like a manipulative best friend. You don't know if she's coming to your wedding bearing gifts or to dismantle your marriage.
She also committed murder in Season 5 (like, straight up did it herself) and has secondhand killed more than one person in the final season.
That's why she lost all her friends and co-workers for a while, was ousted by Mellie's administration and was only saved when she had a "come to Jesus" moment during the crossover with "How to Get Away with Murder."
She also more than made up for her crimes by being the ringleader in the decision for the group to testify to all of their shadiest moves in the final episode. And seeing as they are all willing to agree to go "over a cliff" with her -- well, she's less an anti-hero than she was before.