The Collaborative International Dictionary
Influencer
Influencer \In"flu*en*cer\ ([i^]n"fl[-u]*en*s[~e]r), n. One who, or that which, influences.
Wiktionary
influencer
n. A person who or a thing which influences.
Wikipedia
Usage examples of "influencer".
Costa was not unlikely the real founder, or, at the least, the strongest influencer of the Bolognese school.