Strongest Uchiha, besides Madara

[5nationer]

Izuna Uchiha
He was Madara's brother . Because of him Madara gained
EMS

 

[Guy Fawkes]

Izuna Uchiha
He was Madara's brother . Because of him Madara gained
EMS

He was also said to be just as powerful as MS madaraO_O. So since madara gained Izuna MS eyes upon Tobirama dealing a fatal blow with his S/T jutsu, he became even more powerful so basically two madaras fused lol making him OP AF lol

 

[Darklor]

Izuna uchiha
As mentioned the only one who can surpass madara

 

[Your Creepy Stalker]

Obito is strongest, including madara