if we ask the question the other way around, i think its pretty easy to give an answer, probably Batman is the guy who comes the more often to help other heroes and its very to understand because batman make sales, (superman can be in this disscussion too)
But here that is not the question! We want to define the heroes who ask the more often some help from other heroes in his own title. So in your opinion who is it?
The guy who win this disscussion will receive a bad reputation, because that simply signify that he s not able to beat his own rogues gallery by himself.