Board Thread:General Discussion/@comment-24809896-20140621004139/@comment-6904925-20140708202814

I would think the last two would be Kisuke for his intelligence, he was the one who created the Hōgyoku as well as making those shadow pills that got back the Soul Reapers bankai's, so it would make sense for him to be one.

The second one could be Shunsui, for his quick thinking and strength, he made Central 46 give in to his request about having two lieutenants and allowing Kenpachi to train. Also for defeating one of 1 Espada Stark with only his Shikai, and being the one of the few to defeat an Espada with his Shikai (Rukia was lucky in her fight, because Aarnerio let his guard down and Kenpachi used his raw power but when he used Kendo, it seemed to me that was his substitute-bankai), and having the Sternritter Grandmaster to confront him means he is a big threat.