Naruto and Sasuke both. Sasuke has some superiority complex because he feels vulnerable if he's not the strongest, he believes emotional pain makes him stronger so he tries to break the bond.
Naruto has been alone his whole life, so he finds a friend and he will never let him go or get over it, because he feels unimportant whenever he's not trying to prove something to someone or do something for someone.
They both got hardcore issues, but it works for them both just fine. Naruto internalizes it all, and Sasuke externalizes it.
Neither are what I would describe as normal emotionally balanced people, but then again, 'normal' and 'emo' are terms created by society after all...