If you can prove that Kabuto can take control of Madara my hat goes off to you but without evidence of this my statement stands that Madara isn't being controlled by Kabuto and if Kabuto tried he would break out of it like Itachi did
Actually that's not true in a previous chapter Kabuto states that he has resurrected Madara, made him more powerful then his prime, and given him complete control of himself so Madara didn't have to free himself in the first place, but if he did he could
I doubt ANYONE could control the SO6P due to how great of a nin that he was made out to be. Also he created all ninjutsu and created all the ninja we see today, therefore IF Mishi really did let Tobi control SO6P I would be extremely disappointed in that because if Itachi can not be controlled...