I agree with the topic, just go see what Sengoku thinks of 1 Yonkou vs all the navy forces + Shichibukai + government Pacifists.
Can you imagine a Yonkou WB prime? Bro, the guy destroyed the navy headquarters, saved Ace temporarily, beat Akainu, and all this while he was weakened, sick and extremely nerfed, Yonkou WB at his Peak beats the navy headquarters easily, and defeats all 3 admirals.