You forgot DR. Cyber (arguably the most powerful of the docters). I don’t know I something about her visual lends itself more to mythic interpretation then a sci-fi one. Wonder Woman tends to have two types of villains. Villains that represent the world she left (gods,sorcerers and mythic beasts) and the villains that represent the world she traveled to ( mad scientists, evil business people, politicians and evil organizations). Just feel Giganta fits better in the former rather then the latter.