i truly believe a raging Shanks will stomp him literally.
Oda himself said it:
Shanks is strong when he's angry Big Mom when she's in tantrum and Kaido by just being Kaido.
Shanks is OP Strongest character, Mihawk is only the strongest swordsman.
i don't think anyone can beat a bloodlust Shanks and if their is its either a yonko or a marine fleet admiral thats it.