Was he really a villain, or more akin to being a natural Force of Cosmos, like a Cosmic Tidal wave that was bad news if ran into you?
that is doing what he does. For him it is more about conflict with the world. From the perspective of those whose world he is going to eat he is a bad guy. From the greater whole he is not.
Even from the beginning they were pushing that Galactus himself was not evil, like Mephisto. He was doing what he needed to do in order to exist. That was always the case. Some things were added but the force of nature thing is apt in a way. Although Galactus is more intelligent and such than any storm.