juha bach(if he gets every quincy power when they die.)
dangai ichigo
butterfly aizen
banka yama
bankai yama cannot be stronger than ichigo and aizen at that time as they had tramscended the boundaries of shinigami. sommuch so in fact that mere shinigami could not sense their power. ichigo was even more powerful than aizen so much so that he couldn't feel ichigo's power. bankai yama may have a hax bankai, but remember a battle between shinigami is a battle of reiatsu. also, the fact juha was able to steal yama's bankai means they are of similar power at least. but still, we haven't seen bach fight yet to give a real assessment. also, the zero division should be stronger than yama. oestsu and oeshou should both definitely be stronger if the rest aren't.