In my opinion, I'd say:
EMS Madara: KCM2 + SM Naruto
YM Obito: KCM1 Naruto
OM Obito: KCM2 Naruto
MS + Rinnegan Obito: KCM2 + SM Naruto
Edo Madara (no regeneration): KCM2 + SM Naruto
Unstable Juubito: SPSM Naruto (w/o KCM2)
Stable Juubito: SPSM Naruto (w/o KCM2)
1R SM Revived Madara: SPSM Naruto (w/o KCM2)
1R Juubidara: SPSM Naruto (w/o KCM2)
GTA Juubidara: Base TL Naruto
DR Juubidara: SOSP Teen Naruto
Rinnesharingan Juubidara: SOSP Teen Naruto