Sage mode Naruto gets one shot unless you mean kcm + god power naruto
He wouldn't even have to directly touch Luffy to hit him, and if he does, he can fuck up his internal organs immediately so there goes that rubber protection.
Never mind what he can do with Rasenshuriken or the weaker variations of it, including the one he can shoot like a laser. Throw in clones and it's even more madness.
idk why this is still a topic of debate in 2024. Naruto left Luffy in dust years ago and the gap has never come close to closing again.