Well there's a (possibly) distinct personality classification known as Narcissistic Personality Disorder: http://en.wikipedia.org/wiki/Narcissistic_personality_disord... These guys are a bit different, they have more of a weak spot and are less cold and calculating, but they are also thought to have zero empathy.

EDIT: Also, how are we to know whether Steve Jobs has any empathy? The whole thing with sociopaths is that they're good at faking it.