Friend of mine, GP with background in mental health, has diagnosed Pardew as a pure psychopath. In his case, it's
indicated by the narcissism you mention, and also by:
the anti-social behaviour
the violence
the compulsive lying
the lack of empathy
Google 'dark triad'.
He's an appalling excuse for a man, and football manager but in mitigation, he's very ill.
My guess would be that this is the psychological profile of a football manager at a big club - or probably most clubs
probs the top executives of big business and banks etc tbh.