Lady Macbeth was a very prominent figure in the death of Duncan. Macbeth probably wouldn't have even gone through with the murder if she hadn't intimidated him. He was scared of her, and she told him that he wasn't a man if he couldn't go through with it. She was the evil, driving force behind the deed. Her greediness for power was what landed them in the following situation. In my opinion, she was more evil than her husband, Macbeth. He had morals and convictions for killing the man who had given him nothing but positions and kindness. She didn't feel at all bad, because she lusted for the wealth and position of power over everyone.