OP, Naruto and Sasuke are not equal. Right now Naruto is stronger.
Yes, 1st Hokage is powerful without the tail beast power and that's because he received the 10 tails beast power a different way than Naruto. Unlike Naruto the 1st family trained him at a young age and he never had a tail beast holding him back by making it harder to control his chakra.
Sasuke has the 10 tails power as well. Its just different. He doesn't have to worry about that power trying to control him or kill you. He doesn't have to cooperate with the power to use it to the fullest. Thanks to the way Sasuke received his power and the type of tail beast power he has in a way he has all the pros of being a jinchuriki and none of the cons.
I will say the same thing I have been saying for a while. All power and chakra originates from the 10 tails. The differences are how each character obtains their power. So all of this borrowed power arguments are stupid because all you are doing is arguing over how a character obtain their power.