Although Naruto inherited the Will of Fire originally passed down from Hashirama, i would say Narutos ideals are more idealistic. he seems less naive than hashi was at times and has for the most part, proven his ability to change that which was once negative (Nagato, Gaara, Kurama, etc) into something positive. The fact that it is his goal to do this to the Ninja World (unification of the Kages and villages for the purpose of protecting him indirectly) proves to me that his goal is something that can be obtained. The challenge is if he can truly change Sasuke (obviously).
So i would say Naruto. although without Hashirama, none of this would have been possible.