As frightening as movie psychopaths like Norman Bates and Hannibal Lecter appear on the big screen, turns out they may not be as realistic compared to their real-life counterparts. In 2013, Belgian psychiatrists watched over 400 movies to decide which fictional psychopath are based in reality and which ones were pure fiction.
Read the details. URL:http://www.businessinsider.com/most-realistic-movie-psychopath-2016-5?IR=T
ARYAN'S BLOG 
For me the most realistic one is Gone girl so far, although the end was shitty and made her look much more like a narcissist than a psychopath.