The Journal of Individual Differences Research identifies Hitler as an introvert.
Reinhold Hainish [personal friend of Hitler 1909-1912] identifies Hitler as an introvert.
August Kubizek [personal friend of Hitler 1908] identifies Hitler as having Histrionic traits.
Albert Speer identifies Hitler as having Histrionic traits.
David Keirsey Sr. identifies Hitler as ENFJ (Source: Please Understand Me I, Prometheus Books 1984, p. 202).
David Keirsey Jr. identifies Hitler as INFP (Source: Personal correspondence with Keirsey Jr. 2014).
Marie-Louise von Franz asserts that Hitler’s inferior function is neither Feeling nor Intuition (i.e. Hitler is INJ, IFP, EFJ, or ENP) (Source: Von Franz: Psychotherapy, Shambhala 1993, p. 59-60).
C.G. Jung did not speak about Hitler’s type in typological terms, but he described Hitler in a way that is reminiscent of his description of IN-J types in Psychological Types, leading at least one Jung scholar to infer that Jung identified Hitler as an N or Ni type. Jung also described Hitler as “shy and friendly,” again without speaking directly on the topic of Hitler’s type.
C.A. Meier [president of the C.G. Jung Institute] identifies Hitler as IN-J (Source).
John Beebe [Jungian analyst and MD] identifies Hitler as IS-J (Source).
CelebrityTypes Admin Team identifies Hitler as INFJ.