I think Hashirama. Minato had alot of potential, he just didn't live long.
In my view, Hashirama shouldn't be call a hokage. He was more of a founder who got the ball rolling and die before a shit load of problems came into existent. Sort of a christopher columbus to me lol.
Sasuke would've been the best Hokage.
Out of them, none.
He is the true Hokage like Itachi is - The Fire "Shadow" who protects Konoha from the outside.