RPG's are particularly bad about tying experience to an arbitrary point rating, often granting awards for treasure stolen or enemies defeated without regard to the degree to which the hero was transformed by the experience. The archetypes below all serve various functions. They are not meant to be specific types of creatures. In fact not all functions are taken on by physical characters. The function of a Herald might be taken by a newspaper headline or the call of a town crier, or the posted notice on a tavern wall.
Function is what is important.
HERO Heros are easy to spot. They are the characters that we most identify with when we see a movie or read a book. In an RPG however, they are a little more difficult. With smaller groups this is less a problem, but with larger RPG troupes it can be difficult to work all of the hero's into the story. One is a primary, hero character, the others are allies, side-kicks, and companions of other hero characters in the group.