Hero. Almost super. An interesting idea. He definitely had some Batman-ish tendencies as far as stepping just over the line to accomplish what he thought was right.
So far, everyone has talked about the losses of not having Aaron's (and those like him) extraordinary contributions.
I wonder if a better way to count the cost is by how many bitter, cynical super-villains we're creating. What happens when all of the people with Aaron's talents decide that good is for suckers and become "investment" bankers instead. A culture that loudly and openly demonstrates that it cares nothing for truth or justice and reduces the law to politics is going to create a lot more Madoffs than Swartzes.