Hard to choose between Shikaku, Minato and Chouza, I think the're equals because Minato did not too many things as father, yet they were pretty important and have caused some major influence to Naruto, but obiviously Shikaku raised his son almost perfectly good. And Chouji seems to love his father deeply as well, and they have pretty close relationship as father and son, yet we've seen too little of this. I'd say that Minato would be the best if he was alive all this time, but since he wasnt, Shikaku takes it.