I'm guessing Naruto is above Madara, below Kaguya and stronger than Sasuke. Naruto should be able to use different elements and a kekkei genkai flawlessly as the 7th Hokage.
Not sure why you guys say Naruto or Sasuke > Madara. They obviously needed each-other to stand a chance. Just because he excelled against Kaguya isn't a reason to state that. Sasuke excelled against Madara, but didn't do much against Kaguya. Naruto excelled against Kaguya, but didn't do much against Madara.
"Tank" characters like Madara and Naruto seem to get hit more easily from " Tricky" ones like Sasuke and Kaguya. Also, "Tricky" shinobi seem to get hit by tank ones fairly easily aswell.
"Tricky" Sasuke hit "Tank" Madara.
"Tank" Naruto did not hit "Tank" Madara much.
"Tricky" Sasuke didn't hit "Tricky" Kaguya.
"Tricky" Sasuke hit "Tank" Madara.
That is why Naruto and Sasuke seem to appear equal.