Regulus Corneas for
8-B
It's pretty much impossible to interact with him unless you have some very specific form of non-physical interaction that allows you to breach space-time. Because his ability allows him to stop his own time, which cancels out cause and effect on himself - making it impossible to interact with him.
He can also ignore physics to cut through space. And by stopping the time of objects he can make it so that they pierce through anything in their path due to them not being affecting by causality n such. Which allows him to negate durability.
I think he could take the 3rd spot? I don't know what stops him from killing
Shigara Masami.