Neutral Good, “Benefactor”: A neutral good character does the best that a good person can do. He is devoted to helping others. He works with kings and magistrates but does not feel beholden to them..
Neutral good is the best alignment you can be because it means doing what is good without bias for or against order.
If you note the AD&D rules do not put Spiderman in the NG category, that's Wikipedia.
Spiderman does not work with the law, really ever. Batman would be more apt of an analogy here as he does work with the law (Commissioner Gordon) but is in no way beholden to the law,
QED: Woodhope = bat-wing
(show'em Sanford)