A psychopath (someone with "psychopathic personality disorder"), as I understand it, is not distinguished only by his/her actions. Prefacing this that I'm not forensically trained but have an ongoing interest in the field, read about it, go to meetings, etc. There is a core difference is their personality organization, and perhaps even their physiology. To simplify, they do not have the moral sense to push down in the first place. Some theorize their predatory behaviors are an effort to get themselves stimulated, because they're often indifferent or removed from most situations. When they're on the "hunt," they get calmer(including their VS), whereas most people would get more anxious and try to suppress it do to what they have to do.
Someone who compartmentalizes might be good at rationalizing their behavior, and push themselves to do things that if looked at from the outside be repulsive or easily judged as wrong. They might have a slow creep in ethical violations, and not realize they're crossing lines, because they've steadily locked away that emotional part of reactions. Physicians in general are probably very good at compartmentalizing, because we need to do that to do our jobs. This is different than doing predatory behavior because it "gets us off."
Some CEO's probably are psychopaths.
http://www.amazon.com/Snakes-Suits-When-Psychopaths-Work/dp/0061147893/
Some surgeons probably are, too. Meaning they have the core personality, though they've channeled it into something socially acceptable. But some might just have compartmentalized slowly their morals or ethics, for the purpose of succeeding through competition, rationalizing that the ends justify the means.
Antisocial behavior could theoretically be done by anyone. Just like malingering could, in certain circumstances. The difference though, might be in the risk of real violations, and the possibility of rehabilitation. Whopper, want to chime in on this one?