I like them both, these two are the backbone of this series, however this series is coming to an end and I believe time is up for Sasuke, I believe he will meet his doom, sadly its in his uchiha blood. Im going to go with Naruto because Naruto's resolve is peace in which nations that once hated and killed each other can now cooperate and find peace, whilst Sasuke's resolve of peace is where he feels the kages of the past are the ones at fault for the deaths of his clan and darkness in the world, while that is true Sasuke is to naiive (as Itachi stated to naruto) to understand that the will that has been bestowed unto Naruto from the people Naruto has met, fought(Iruka, Pervy sage, Itachi, nagato etc..) is that Naruto is the savior of the world and a harbinger of peace.