bigwig vs personage

bigwig and personage both are nouns.

Word	Noun	Adjective	Verb	Adverb
bigwig	Yes	No	No	No
personage	Yes	No	No	No

As nouns, personage is a hypernym of bigwig; that is, personage is a word with a broader meaning than bigwig:

bigwig: the most important person in a group or undertaking
personage: a person whose actions and opinions strongly influence the course of events

Other hypernyms of bigwig include important person, influential person.

bigwig (noun)	personage (noun)
the most important person in a group or undertaking	another word for person; a person not meriting identification
	a person whose actions and opinions strongly influence the course of events