So Madara with edo tensei (infinite chakra) solo'd the 5 kage's? Well done, but it fades in comparison to what Itachi did.
Then Madara stole chakra from Hashirama, he sealed the bijuu's, he turned in to a little kid xD seriously I am so sorry for you Madara fans, he was so badass that Madara, then he turned into some wannabe Ridukou sennin mode, which looks like a kid, and it looks hilarious. I am so sorry..
I must however credit Itachi's reputation. Madara fans have to make such threads, even though Madara has been given countless power-ups, which any character in the series will pale in comparison to. That fact alone, is why Itachi is still the TRUE SOLOKING. U_U
Isn't it sad knowing, that Madara will eventually be defeated by the shinobi alliance?
... Itachi didn't slaughter the entire clan by himself.
Er, so not quite the 'solo' act you're making it out to be. Itachi offered to aid him (Obito) in destroying the clan in exchange for leaving the rest of the village and Sasuke alone.
But even if he had, slaughtering a clan made of not just shinobi but children and civilans too isn't as impressve as say - slaughtering entire divisions or armies of enemy nin.
Credit where it's due though, he did defeat Orochimaru (twice) and Kakashi Hatake by himself with relative ease.
I adore Itachi, but honestly if you don't agree with Madara surpassing him in this then you should at least recognise that Minato has.
Madara is the solo King. This isn't even debatable. Itachi soloed Kakashi, Kurenai, and Orochimaru twice. Could of soloed Hebi Sauce. Outside of that, he soloed Chuunin Sasuke and some of the Uchiha clan. Madara soloed Naruto, Sasuke, all nine Bijuu, Killer Bee, Tobirama, an army, Gokage, and stalemated Hashirama, all in one night, made Minato look like irrelevant fodder and did not even try in a single one of these fights except for Hashirama who stalemated with him.