Oh and BTW yamamoto would ez kill natsu and shinra cause he's just too STRONK without his Shikai. He could just use Bankai against ACE and win ez gg no re
I don't know a lot about bleach but i know that bankai is a sword and if ace is made out of fire the sword will go right through him unless he uses armament haki which I am sure he doesn't.
In a 1v1v1v1, Yamamoto would take the win if everyone in there was tangible due to his SHEER POWER in martial arts taking out Shinra and Natsu EZ and using his Shikai Ennetsu Jigoku to destroy Ace.