The 10 Strongest Characters in the series

[Naruto D Luffy]

I agree with your list

 

[Nazgul]

With EDO Tensei

So6P
Kabuto
Madara EDO
Hashirama
Obito
Naruto
Nagato
Sasuke
Itachi
Minato



W/O EDO Tensei

So6P
Hashirama
Obito
Madara EMS
Naruto
Nagato
Kabuto DSM
Sasuke
Itachi
Minato


Some other characters who can make it

Oro if he has edo control, Hiruzen (prime), Bee, Muu, Shisui / Danzo, 2nd Mizukage, 3rd Raikage.

 

[Courtship dating]

With EDO Tensei

So6P
Kabuto
Orochimaru
Madara EDO
Hashirama
Obito
Naruto
Nagato
Sasuke
Edo Itachi




W/O EDO Tensei

So6P
Hashirama
Obito
Madara EMS
Naruto
Nagato
Kabuto DSM
Sasuke
Itachi
Minato