Kakashi. He is the oldest and has done the most in his life. If he died, he'd be able to die in peace knowing that Team 7 is happy and that Obito isn't suffering anymore. Sasuke, Sakura and Naruto all have kids they need to raise and are still very young. So as painful as it is, I wouldn't be as upset if Kakashi died.
I wouldn't be as upset if Kakashi died.
Heartless! What about Kakashi's kids with Gai? Don't they count as something?
Naruto :|
Sakura isn't important enough, and Naruto dying would cause some interesting after effects
All of them.