authoritarian

One who commands absolute obedience to his or her authority.

"The dictator was an authoritarian."

One who follows and is excessively obedient to authority.

"2006, Robert Altemeyer, The Authoritarians"

Of, or relating to, or exhibiting strict obedience to an authority; favoring authoritarianism over civic and individual liberties.

Demanding obedience to authority; marked by authoritarianism; dictatorial, tyrannical.

"The authoritarian government was demanding stricter laws for low-wage peasants."

Tending to impose one's demands upon others as if one were an authority.