Hmmm lets see.
Sakumo: He committed suicide because the village turned on him for saving the lives of his comrades, instead of sending them to their deaths during a mission. Which later on turned out to be a good thing.
Minato: As stated above he died protecting his son, and the village. As for sealing Kurama in Naruto, it turned out the be the best thing he could have done.
Kizashi: He may make bad jokes and what not, but most dads do that to their kids friends. But it just shows that he takes an interest in his daughter and her friends.
Fukagu: Whilst he did favor Itachi over Sasuke he still loved him, but like many people he was blinded by Itachi's skill.
Naruto: He is Hokage, it is a full time job that requires much of his time. But he still spends time with his kids when he can.
Sasuke: He obviously has his reasons for not being around, so until we hear those reasons it can't be confirmed if he is a bad or good father imo.
So for me I would give the "worst" father title to Fukagu, simply because a parent should never favor one over the other.
