Without a doubt, clearly Kuchiki Byakuya.
Why? Fight spoilers below!
He knows exactly what he wants, and is willing to make sacrifices that nobody else would be willing to make.
An opponent taking control of my arm? No problem, just sever the nerves connecting to the limb. I can still hold a sword and practice kidou with one hand, which I intend on pwning you with.
An opponent taking control of my leg? No problem, just sever the nerves connecting to the leg. I can still shunpo faster than you even with one leg.
Oh, what's this? Each one of your eyes can control one object?
Oh, what's this? You have dozens of eyes?
All right, playtime's over. Let's see you try to take control over millions and millions of tiny little blades.