On the serious part of your post, discovery/revelation of character is core to the greatest fantasy fiction: LotR (Frodo, Sam, Aragorn, even Gimli and Gandalf); Earthsea (Ged and Tenar and Arren); better versions of Arthurian myth (eg the film Excalibur); some of the best Wuxia films (eg Ashes of Time, Hero, Crouching Tiger, even Tai Chi Master); Star Wars; etc.
Adventure fiction with no character development - for me, James Bond films probably count as a paradigm of this, at least pre-Daniel Craig (and even then it's not the richest of all time!) - can tend to shallowness precisely because of that.