influential person vs important person

influential person and important person both are nouns.

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

As nouns, influential person and important person are synonyms defined as:

influential person and important person: a person whose actions and opinions strongly influence the course of events

Other synonyms of influential person include personage.

influential person (noun)	important person (noun)
a person whose actions and opinions strongly influence the course of events	a person whose actions and opinions strongly influence the course of events