1) Aesop 2) Disciplinarian 3) Elitist 4) Equalitarian 5) Martinet 6) Stickler 1) Didactic writer 2) High-principled one 3) Increase Mather was one 4) Philosopher 5) Student of ethics 
• (n.) One who practices moral duties; a person who lives in conformity with moral rules; one of correct deportment and dealings with his fellow-creatures; -- sometimes used in contradistinction to one whose life is controlled by religious motives. • (n.) One who moralizes; one who teaches or animadverts upon the duties of life; a writer ...
Mor'al·ist noun [ Confer French moraliste .] 1. One who moralizes; one who teaches or animadverts upon the duties of life; a writer of essays intended to correct vice and inculcate moral duties. Addison. 2. One who practices moral duties; a person who lives in conformity ...
[n] - a philosopher who specializes in morals and moral problems
noun a philosopher who specializes in morals and moral problems
a person who teaches or inculcates morality. · a philosopher concerned with the principles of morality. · a person who practices morality. · a person concerned with regulating the morals of others, as by imposing censorship.