Well, let's begin dismantling your thread.
1, your hate for Gai perplexes me. Gai has to die to hurt his enemy? No my good sir. You forget that he was fighting a juubi jin who can regenerate, only using taijutsu.You also apparently forgot that Kisame ran like a punk from Gai.
2, Itachi? Overrated? I admit, comparing him to Kaguya is definitely a sensationalist claim that should be disregarded in the first place. As far as overrated, Itach is praised for being a genius, which is something you can't deny, so stop hating. As far as physical feats, Itachi is a master of genjutsu, taijutsu, and is able to use a wide variety of ninjutsu. His Susanoo comes armed with the weapons of gods. The totsuka blade seals everything it touches, and the Yata mirror deflects everything. His Tsukyomi is second only to IT and KA as far as genjutsu, and his Katon is impeccable. Amaterasu as well. And the best shurikan technician in Konoha. Tell me again about him being overrated.
3, Wind beats Lightning in the Narutoverse so no, Minato won and would've won regardless of the circumstances.
4, Hiruzen has no feats? What about him single handedly countering the Buddha with all 5 elements.
I'd continue, but I think that should be sufficient.