I'm just curious why you would have Genshiro as one the most powerful lts. Are you presuming based on his age and probable experience? Or are you assuming based on Yamamoto putting 1st division barracks under Genshiro's protection?
OT:
Renji
Rukia
Yachiru/Chojiro
Shuhei
Rangiku
Kira/Momo
Nanao
Iba
Nemu
Biggie Smalls
Isane.