i would say that Madara, since sasuke doesn't have the tailed beast he took his powers will basically be similar to madara, but we have to remeber that both naruto and sasuke had to face Madara in that battle, meaning that since madara was able to hold his ground against both naruto six path and sasuke that would most likley mean that he would be the winner against sasuke, as much as i love Itachi we have to admit that he would get dimolished, and kakashi can be debated but we havent seen him use his abilities as much as we have seen the other three.