Honestly even if Aramaki got past Yamato, the Scabbards, and Momo, he'd have to deal with:
Law
Kidd
Jinbe
Sanji
Zoro
Luffy
Kinemon
Kiku
Killer
Etc.
And I mean, Aramaki's strong.
No doubts about that.
But come on, he is NOT beating all of them back-to-back.
He may win against the majority or them in a 1v1 but not if they team up or he fights them one after another without a chance to heal.
He's dying.