Typist

noun

A person who is prejudiced against or toward individuals based on their typological or personality type, as categorized by MBTI (Myers-Briggs Type Indicator) or Jungian typology. This person may harbor biases or make unfair judgments about others based on their perceived personality type.

Max was the quintessential typist; he insisted that only an ESTJ could run a marathon properly, dismissing anyone else’s training methods as 'inefficient' and 'disorganized.