Get to 6 and IF he can siphon there Hyperspace energy (which I think he can) he gets to Dark Phoenix which as a fight has been discussed more then there are days in the year
Gender: Male Location: Following the Source of Light.
Galactus makes it to six with no issue. I don't know where to place the Celestials in comparison with Galactus (and I don't think their power levels are all the same), but this seems like pretty many for him to fight off. They could stop him. Hmmm, I'll wait for others to way in on number 6.
I assume Mephisto and Dormammu is battling outside there dimensions if that is the case then Mephisto isn't making much of a battle dormammu would give him a fight but not enough.
As for the defenders SS oneshotted Namor and Hulk too. Dr Strange will die pretty quickly too seeing as how Galactus toke on Agamotto without great difficuelty and the funny part is that Galactus didn't even take the fight very seriously.
The Olympians would put up a fight but seeing how easily Galactus toke care of Hercules the only problem I'm seeing is Zeus and IMO Zeus shouldn't present a problem to Galactus.
Now he has used energy but Galactus can go for months without feeding so his energy use rate isn't that great again.
Also I thought King Thor = Odin and that it was Rune King Thor that > Odin...
But still most asgardiens would probably go down pretty quickly a blast like the one from annihilation 6# then almost all of them will be dead... IMO.
Gender: Male Location: Following the Source of Light.
Here's my deal: I see Galactus as one of the strongest physical/fringe-conceptual beings in the Universe. I see him as superior to the Phoenix after viewing much evidence and arguments in other threads. If he decides to absorb the Celestials, then he probably could win this. Thing is, I'm not real familiar with the Celestial's feats (if they have them), so I don't know if Big G is outnumbered and outgunned or not. After eating just one planet, is he strong enough to take them all? I dunno.
It is a damm good team hence my reason for saying that he would win that fight only if he could begin absorbing there hyperspace energy, a fed Galactus against 9 celestials including Arishem is to much for him.