Honestly Prime Obito with double Kamui solo's everyone
No, they're not. Their powers combined is what makes up 1-eyed Madara's power. That's why they needed to work together to fight him.
Never existed like prime hiruzen. BTW Maybe there was a Prime hiruzen but " Prime Obito" never. Always 1 eyed kamui. The question is the powerlevels. Imo the juubi jins power is above them (solo)