Naruto
So help me understand the series of events here. Obito absorbs the ten tails, becomes the jinchuriki. Fights around a bit, then eventually spawns the ten tails out of his back, which then becomes the sacred tree. He's still the jinchuriki though for some reason, I guess he's holding on to some portion of its power?
Regardless, blah blah blah, Madara sucks out his remaining bijuu chakra, becomes the jinchuriki himself, despite the main body of the ten tails still not being in either of them, it's the tree. But then Madara ALSO summons a big fuckin ten tails body, and sucks it into his back, in order to take on his proper jinchuriki form. Where the fuck did THAT ten tails come from? The TREE is the ten tails, there was no ten tails to summon and fuse with.
Now in this chapter we have him actually absorb the tree, but what the hell was he fighting with before that?
People gotta stop making it sound like Naruto keeps getting powerups without earning them. Everything he's learned through the manga has been due to intensive training, but also intensive intra-personal interaction with other people, which is arguably the most hard-workey of the things he does on a regular basis. People make fun of talk no jutsu, but the fact is that only Naruto due to the events he's lived through and the challenges he's overcome is capable of making a persuading argument to these people.
And you gotta think about the nature of the powers he has now. He's only using full bijuu power because he managed to overcome that Dark Naruto and pair successfully with Kurama, whose opinion of him he changed over like a decade of life. He was only able to damage Obito in the first place because of his extensive Sage Mode training and battle experience. His greatest achievement, though, was managing to not only defeat the juubi that were under Obito's control via his litany of earned powers, but to convince Son Goku that he was worth donating power to. Through him and his friendship with Kurama he managed to gain the trust of all of the remaining bijuu, and only by acquiring a portion of all their power was he able to use the abilities he's now showing off in this chapter. Sure, the Sage of Six Paths only appeared to him (and Sasuke) because they had his kids' chakra, but while Sasuke got yet another magical genetic powerup in keeping with his powerups throughout the whole series, Naruto's was focused very much around all those bijuu inside him, which only helped him because of everything he had managed to do in the manga up until that point. It turns out in the end that yes, he was special, but he still hard-worked his way through virtually everything.