Uchiha Madara, of course. He is one of the strongest (if not THE strongest) members of the Uchiha Clan. Since the Uchiha Clan is considered as a powerful clan, it is quite safe to say that Madara can stand up against the likes of Deidara.
Madara is by far the strongest. If Itachi was stronger he would've killed madara himself.
probably not because Tobi is madara uchiha in disguise
Well that depends when you say madara if you mean Tobi then yes he was afraid of itachi.
tobi(obito uchiha with Madara Uchiha soul )
Madara. Not only does he have the eternal Mangekyou Sharingan, he has the Rinnegan too, as well as the implanted cells from Hashirama Senju.
Probably Uchiha Madara
Very close fight, but if u have read the manga, ul see that Yondaime defeats madara and kyuubi single handedly
Uchiha Madara was a highly skilled ninja who lived years previously. He helped lead the Uchiha clan and was one of the founders of Konoha. He also trained Itachi. Madara helped Itachi with the Uchiha Clan Massacre.
He is one of the strongest however Madara Uchiha could be stronger.
Sasuke Uchiha and Madara Uchiha
Madara NEVER turned into Obito. Madara was under the disguise 'Tobi' for alot of the past episodes but after Deidara's death, he revealed himself to be the imortal Madara Uchiha. Obito was crushed under a rock when on a mission with Rin and Kakashi around 13 years of age.
Sorry madara fans but itachi is stronger than madara because if you read the comic or even watch the shows you would after itachi death madara said that if itachi know that he know this much information he would already kill him watch it you would know