2. Tobirama Senju
Tobirama Senju was a super strong shinobi. He was extremely wise and innovative, and invented tonnes of Jutsu. Tobirama was also a very good Hokage. He planted the idea that the village as a whole was much greater than a mere clan.
Tobirama also created the ANBU division, the Academy for children, and the Chūnin Exams. He also installed the Konoha Police Department, and made the Uchiha its head. He also took this role much more seriously, and had a more direct approach than his brother, which made him a better Hokage.