As for just focusing on creating the feat itself, the 2005 Core Rules mention that heroes fall under certain action-hero cliches. And obviously these cliches create certain attributes for a hero. For instance, a super soldier with herculean strength could pick up a car and throw it or something. This also creates some great opportunity for background fluff for your hero.
The Master Rayhawk has some statcards made up for the Knights Kingdom heroes, Jayko, Danju, etc., under the supplements section. These could give you maybe the "balanced" ideas you are looking for.