>>281207558
Depends on the game. In some games, Hero is like something above Jack-of-All-Trades. You can min-max him to anything and although his stats won't be the same as a min-maxed class, he will have some pretty bullshit skills, as a Protagonist should.
In some games, they are basically a Master-of-All-Trades. Though in this case they are more exclusive.
And some RPGs, Hero is basically an Anti-Evil protagonist-like class. Close to a paladin but with some stuff like Bonus stats in low health for reversal, enhanced crit against evil etc.