He is, The Man Who Killed
This Cannot be Stressed Often Enough —
The Actual, Historical and Literal Meaning of ‘Hero’ specifically refers to a DEAD Man Who is Worshipped, Venerated and Appealed-to in The Afterlife.
So, as George Lucas has always been absolutely explicit in stating, The Star Wars Saga is NOT about Luke Skywalker or Han Solo,
Star Wars is about Darth Vader.
So The Hero of The Star Wars Saga, Episodes IV-VI and for the first 6 Episodes as a whole is Anakin Skywalker, because he is a Dead Man who is idolised by his son to the extent that he journeys into The Underworld of The Death Star (Hades) to release him from eternal torment inside his own broken, mutilated reanimated corpse of a body, after being cast down into a lake of fire and clawing his way back up from Hell by his fingernails and cast iron will.
As of 2017, for the first time, Luke Skywalker became The Hero —
Because he is now DEAD.
He is,