Eric

Tbh there's several that can before white beard died he could If Big Mom and Kaido are still alive which I'm pretty sure they are they coukd definitely Garp can dragon more then likely Magellan can still probably can and blackbeards is 50/50 along with loki.

I feel as tho the giant captains and loki's bounty shoukd be bumped up by a billion making them closer to yonko lv and you forgot a giant Panz Fry a giant chef with a Bounty of 320 million berries.

He is an impressive fighter also we have no clue if ace could use conquerers haki since it never showed him using any haki plus not all kids of people with Conquerers haki will inherit the ability to use conquerers great example is Big Moms kids out of all her children only 3 or 4 could use all 3 types and tbh I was skeptical is Teech was ever gonna show off his haki which he showed armarment and I don't count his tremor crash as using conquerers so as far as I'm concerned Teech and ace havnt shown being able to use it yet even tho both there fathers were some of the most powerful men to have ever used it.

The only reason I'm suspicious of this is since shanks is a master class at conversation and diffusing situations but since we know haki can be stored or focused to take out enemys overall i dont think shanks is stronger but you dont have to be with being a master in all 3 haki types and storing enough to negate someone's devil fruit and beating them with the stored haki so I think shanks concentrated his haki to subdue lokki long enough to get him imprisoned in sea prism stone.

Alright if shanks is on this list Big Mom and Kaido need to be on this list 2 both are masters of haki and have very powerful Devil fruits and big mom killed one of the elder giants at 5 years old so as an adult she can definitely take on and beat Harald and Kaido took over a country that the government couldn't and ruled it with an iron fist crushing all opposition and made the world government to afraid to try and take it away from him so yeah those 2 definitely need to be on this list also.

Probably stabbed him in the back also I don't see garling being that strong since shanks is stronger at a similar age to what garling was at god valley and garling got rolled.