ITT: No one has a fucking clue what a psychopath is, and people think a sociopath is something different, and then people disagree with me before checking any sources.
'Sociopath' is a colloquial term and its division from 'Psychopath' has never been decided, as the distinction is made, mostly, by the inferences people draw from comparing 'socio' to 'psycho'. 'Psychopath' is the word used in Psychology, and 'Sociopathy' has no actual definition. Likewise, there are many variants of Psychopathy; some of which include what we commonly think of as Sociopathy.
Also, I wanted to add Don Draper, but he does cry in a few scenes, so I'll go with Reaver from the Fable series.