I believe the answer is: psychopathy and narcissism
In dark triad, Psychopathy is characterized by little no remorse, no emphaty, and antisocial tendencies, and narcissisim is characterized by immense love towards oneself to the point where it make a person think that other people are inferior and he/she should always be the center of attention.
Harvey is a very exciting person, people want to be friends with him, and find his company very desirable. Harvey usually takes the lead within his circle of friends and seldom considers what others want. most likely, Harvey has psychopathy and narcissism.
