You never said he had the power cosmic?
Not sure why this went off topic <_< but goku is not beating WBH easily that is for sure since the Power cosmic is very powerful also no one in DBZ is beating the BIG G at full power
Please don't lie. You clearly implied the notion world breaker hulk had the power cosmic.
If you think power cosmic is an insta-win once again you shouldn't be participating in these battles. Just because one has the power cosmic does not mean they would beat anyone in DBZ. People like Silver Surfer and Fallen One would win no doubts about it. But Terrax and Air-Walker wouldn't really stand a chance against the more top tier guys in DBZ. Not all heralds are equal. Not even close.
Where did galactus come into this discussion anyway? He is incredibly far above damn near anyone in fiction outside of omnipotents and abstracts. If someone needed to be told DBZ would lose to galactus they need to put their helmet back on.