humorist

/HH Y UW1 M ER0 AH0 S T/
noun
  1. 1

    Someone who believes that health and temperament are determined by bodily humours; a humoralist.

  2. 2

    Someone subject to whims or fancies.

  3. 3

    A humorous or witty person, especially someone skilled in humorous writing or performance.

  4. 4

    One who studies or portrays the humours of people.

Source: https://en.wiktionary.org/wiki/humorist