User blog comment:Sosuke Aizen008/Who is the most powerful in stern ritters?/@comment-6299840-20130923065434

If ypu don't count Uryu and Yhwach then I think it is most definitely Jugram Haschwalth It is kind of inferred that before Yhwach appointed Uryu as his successor the other stern ritters thought it would be Haschwalth indicating he is very powerful.