Kaido put up a fight against 2 Ds and a super Chad like Kidd, the lord of the scrolls, 3 crews thousand of samurais and a few hack powers, and he was close to winning if not for obvious shonen plot armour which of course is expected. Not a fraud, he fought and clearly dominated and shown everyone he is the toughest. Not a fraud.
Mihawk was chilling for years, the first time somebody lifted a finger against him he got barely bothered and had an insane skyrocket in his bounty. Not a fraud.
Red haired snitch stopped the war, stopped greenbull and talks with the Gorosei whenever he wants, not a fraud.
Whitebeard is the chaddest of chads.
Monke D Dragon doesn't trust his underlings, lost his HQ, has done fuck all so far, won at Lulusia and lulusia disappeared. Fraud.
Other Frauds are the fishmen.