Of course subjective morality is real, and a lot of the things people declare wrong is more subjective than anything (a quick example would be working on the sabbath, or some other crazy religious rule like "don't cook a young goat in its mothers milk").
However to say there is no objective morality is just wrong, any act that is designed to harm another creature with no other reason besides to harm the creature is evil. If you kill someone for just disagreeing with you that is a evil act, if you hold someone in bondage without their consent that is also objectively immoral.
Basically any act that restricts others freedom to lead a healthy/happy life is objectively immoral - that is not to say that killing someone can not be justified, however it being justified and being good are not the same thing.
For example, if a man has a bomb tied to his chest and is threatening to blow up a buss full of people, you would be justified in killing the man before he had the chance to detonate the bomb, however the fact is, even though you suspected he would blow himself(and the buss) up you did not KNOW that he would... you MAY could had just spoke to the man and brought about a peaceful resolution to the problem - does it make you a bad person for taking the shot? no. However the act of killing the man was immoral regardless of the situation.
Now on to the thread, lol, I'm going to say Kid is the most evil for the reason that he will kill civilians for no other reason than if the disagree or mock him.