Interestingly, I have not actually come across an ESTP psychopath, although I have found the odd ISTP. Psychopaths are actually found to have above average intelligence in most cases, which is a feeder for their more narcissistic traits such as a 'grandiose sense of self worth' or being 'cunning/manipulative'. Cleckley describes the psychopath as 'intelligent'. You forget, Katharsis that most psychopaths are not in prison but are very successful in society, with their aggressive narcissism traits outweighing the effects of social deviancy and granting them the ruthlessness to flourish in professions like the business world. Where the psychopathic and sociopathic disorders overlap i.e. the reckless criminals who dangerously act on impulse without a thought to the consequences (high social deviancy, not as high aggressive narcissism), I would imagine a psychopathological ESTP to lie. Those smart enough to control their impulses for a greater goal 'Ne instead of Se', would be ENTP.
Although fictional and quite caricatured, two good examples of the two would be The Comedian ESTP and The Joker ENTP. One often resorts to mindless violence while the other plots and schemes before unleashing his destruction. Both are impulsive, but one acts in the moment while the other with a mind to the future and consequences. Interestingly, the Joker takes his evil to the extreme, strongly representing the psychopathic traits while the Comedian actually shows remorse shortly before his demise (like many Se users, he acts without considering how he will feel later). One shows psychopathic behaviour while the other sociopathic (AsPD).