1) Kaguya
2) RSG Madara/Hagoromo
3) Hagoromo/RSG Madara
4) Sasuke/Hamura
5) Hamura/Sasuke
Both of Kaguya's eye powers are Kekkei Moura.
Madara's Rinnegan is only Kekkei Genkai, though his Rinne Sharingan is maybe Moura. DB doesn't list him as a Moura user though.
Hagoromo's Rinnegan are Moura.
Sasuke's EMS and 6T Rinnegan are both Genkai.
Hamura's Byakugan and Tenseigan are both Genkai.
Based on eye power alone, a KKG EMS/6T RG combo is arguably better than KKG Byakugan/Tenseigan. The former is a more a versatile and potent eye set from what we've seen. As for Madara and Haggers, the difference in power between KKG and KKM isn't really expanded on, and we've little to compare.
Except of course, Tomogoroshi no Haikotsu and Shikotsumyaku. The difference in power is the difference between night and day, and other Moura ninjutsu have proved to be in their own league too - quickly destroying a PS and overwhelming RSBM Naruto's chakra fists.