Exactly! Half the time they all look the same in the comics. I mean, I've seen Wolverine drawn towering over other characters.
And Quicksilver pudgy. And Galactus they draw whatever size they please...
A good artist know to draw them differently, because it adds personality and distinctiveness to the character. The character starts drawing itself, because subconciously the artist says, "He can't do that," or "He wouldn't stand that way." And a good writer will then incorporate that into the story, as it feeds back into itself.
Anyway, my two cents worth...
(You should hear the arguements with my Greek friends over it.)
But yes, I like that look for Herc. It "fits."