moralists

/M AO1 R AH0 L IH0 S T S/
noun
  1. 1

    One who bases all decisions on perceived morals, especially one who enforces them with censorship.

  2. 2

    A teacher of morals.

Source: https://en.wiktionary.org/wiki/moralist, https://en.wiktionary.org/wiki/moralists