JJ hago murks as a jin. No Juubi Jin? And I'll go with sasuke and Naruto.
Naruto and Sasuke stand absolutely no chance. Hagoromo will do what Kishimoto should’ve let dual Rinnegan Madara do; which is obliterate them. Like UndertheRedHood states, Hagoromo fought Prime Kaguya WITHOUT being a jinchuriki. Naruto and Sasuke don’t stand a snowball’s chance in hell.
If Naruto and Sasuke could beat his mother (who was supposed to be stronger than him) I’d assume they could beat him together. 1vs1 though i’d assume Hago would win.
But he didn’t do it alone. But I see your (And ThRedHood’s) point. We don’t really know what level JJ Hago was at due to the fact that Kaguya was beat before hand and there were no records of him battling as JJ Hago afterwards so it’s a valid assessment.