Um Hiruzen(Scales to Orochimaru), 7-B
Base Hashi(scales to base tsunade possibly 100 seals), 7-B,Possibly At least 7-B
A(Lightning armor A should be comparable to tsunades base form), 7-B
Tobirama(Scales to Orochimaru,Hiruzen for the finger feat and hiruzens comment that his power is amazing), 7-B
physical Madara(Could block lightning armor A punch and kcm narutos rasengan), 7-B
Mei(Could melt and tanked a hit from madaras susanoo which should be comparable to base madara) 7-B
Tsunade should be City+ base form(for being strongest sannin physically and rest of the reasons i mentioned above) while 100 Seals At least City+(One shot madara who could block lightning armor A punch)
Thats about it