Devil's Advocate

I think it depends if he gets his power siphon or if he gets prep time.

I don't have enough knowledge on either of the two.

Doctor Doom has stolen the Power Cosmic from the Silver Surfer (stated himself able to challenge Galactus, and with his intellect it's likely accurate), nearly become Sorcerer Supreme, taken the power of Beyonders, and more. He's battled the likes of Hulk, Doctor Strange, Thanos, the Watcher, and Morgan le Fay.
Galactus has had the Power Cosmic taken from him and been defeated by Doctor Strange more than once. He's also been swatted like a fly by a Beyonder and stated equal to Thanos, who avoids engaging the Hulk in combat. He's been manipulated by the likes of T'Challa and Reed Richards, both of whom are intellectual equals to Doom.
Doom can definitely find a way to defeat Galactus.

Sorry its been half a year you still want me to try this the next time I get a chance?
Also thank you I appreciate it.

You're fine @Taurus but try to use actual feats from the movie & say that they mean he's omnipotent (not just saying he's omnipotent over & over again)

@Unus Of course. I'll get to it as soon as I can; got a lot on my plate right now in general.

@Savage To put it simply, you pick a side in any type of debate and I have to debate for it.

Okay, so like, Spider-Man vs Hulk: death battle
You have to defend Spider-Man. Like that you mean?

Exactly.