hierarch vs influential person

hierarch and influential person both are nouns.

Word	Noun	Adjective	Verb	Adverb
hierarch	Yes	No	No	No
influential person	Yes	No	No	No

As nouns, influential person is a hypernym of hierarch; that is, influential person is a word with a broader meaning than hierarch:

hierarch: a person who holds a high position in a hierarchy
influential person: a person whose actions and opinions strongly influence the course of events

Other hypernyms of hierarch include important person, personage.

hierarch (noun)	influential person (noun)
a senior clergyman and dignitary	a person whose actions and opinions strongly influence the course of events
a person who holds a high position in a hierarchy