good guy vs actor

good guy and actor both are nouns.

Word	Noun	Adjective	Verb	Adverb
good guy	Yes	No	No	No
actor	Yes	No	No	No

As nouns, actor is a hypernym of good guy; that is, actor is a word with a broader meaning than good guy:

Other hypernyms of good guy include doer, worker.

good guy (noun)	actor (noun)
any person who is on your side	a theatrical performer
	a person who acts and gets things done