I Suggest a new epic long and involved quest line that when completed, and wearing the ornaments in all visible armor slots, grants a 1% bonus to damage mitigation to tank classes, healing for priest classes, spell damage for casters, and melee damage for the other classes. The ornaments could have a separate look for each class.
Imo, hero's forge items should remain statless, that way people will have more reasonable options regarding their looks. If there is a "best-in-slot" hero's forge item, then everyone will look the same...and that would be boring. I don't mind quested hero's forge items though, that can add flavor to otherwise boring quest-rewards...