ISTJ

Feeling, Sensation, Intuition, and paired this with their preference for either Extroversion or '''Introversion. '''

In the case of both the ISTJ and ISFJ, Jung would have characterized this type as having dominant Introverted Sensation (Si), which is primarily characterized by an adherence to responsibility and what has been proven true by time.

Personality Basics
ISTJs are primarily characterized as thorough, detail-oriented, dutiful and free-thinking.

Famous ISTJs
Fictional
 * Martin Heidegger
 * Jeff Bezos
 * Thomas Hobbes
 * Sigmund Freud
 * Ingvar Kamprad
 * Robert De Niro
 * Matt Damon
 * I Hate Everything
 * Dr. John Becker (Becker)