1.Yamamoto(his shikai,as it is,could burn your @$$ up)
2.Shunsui and Ukitake(it's cool to have double zanpakutos)
3.Urahara and Isshin(it's really irritating to know that they have all that strength and don't use it)
4.Aizen and Gin(they are the antagonists)
5.Soifon(she can't be a captain without bankai)
6,Matsumoto and Yumichika(they are cool fighters)
and that's the end of my list.