he failed to kill tobi so thats not a victory, and he may have intentionalyl lost to sasuke but he lost nonetheless. if you want to go down that road, nagato also ended his life unbeaten.Itachi; he's never lost to anyone and i've yet to see him be truly outmatched.
Kakashi- saved by guy twice, from kisame and itachi, then from five fully formed tailed beasts "Tailed Beast Balls" ... maybe when Guy was young, but now he surpasses Kakashi I beleive.Currently the Sage of the Six paths is in first Then Minnato, then Kakashi If he would go all out, Why Kakashi you ask? He became a Jonin at the age of 13, he had Anbu Training and is more then qualified to become a Hokage, not to mention he was trained by Minnato. Then theres Naruto, once he unlocks the 9 tails power he shall Surpass Minnato but no one can surpass the Sage of Six Paths.
kakashi cant deflect 5 tbb, and never will be able to,Currently the Sage of the Six paths is in first Then Minnato, then Kakashi If he would go all out, Why Kakashi you ask? He became a Jonin at the age of 13, he had Anbu Training and is more then qualified to become a Hokage, not to mention he was trained by Minnato. Then theres Naruto, once he unlocks the 9 tails power he shall Surpass Minnato but no one can surpass the Sage of Six Paths.