Tobirama. He gave the Uchihas an office they would be proud to run. The police force. He was responsible for enforcing all of the laws around the village. That's crucial in the developing era. Being from the clan that was predominaly strong during the warring states era he understood how the other clans operate.
He understood the Uchiha's feelings and what threats they could pose. He kept Madara's body hidden safely. He did the dirty work to keep the village safe during the Second Shinobi World War.
I like Hokages who do shit for the village. Tobirama expanded Hashirama's plain ideal of just a village. He set the rules and that's what I found most important. He leads by example and plays with people's feelings. A fierce competior willing to do anything for the village. Danzo copied his ideals but Tobirama wasn't a coward unlike Danzo.
He was a very shrewd man indeed.
You must be registered for see images