Hagoromo vs Kaguya

[Nidaime Kiiroi Senko]

Hagoromo himself said she is stronger than him. But if sasuke, naruto, and the other hokages help, than it's a different story.

 

[Unorthodox]

Action speak Louder than words Hagoromo wins

 

[Kronnic]

Dude, you are being silly.. You know for a fact that he can't do it himself and he needed his brother..

 

[MAN OF SIN]

The thing is, we have two states of Hagoromo. One, where he fought alongside Hamura and he had the power of the sun seal, while Hamura was the moon. And the second when he later was the Juubi Jin and had both powers (sun and moon).

Now, I don't think he is as strong as Kaguya even in the second state, but you have to keep this in mind when judging his strength...

Hagoromo as the Juubi's Jin should be the stronger. Considering that Kaguya is the Juubi.