Originally Posted by Spiegel
Marco is the right hand to Whitebeard which is why he is the 1st Commander and has been roaming the seas of the New World for quite sometime, kicking ass and what not. So he's able to hold his own and get a few punches in to any of the Admirals. Basil and the rest of the rookies Supernova powers weren't even half as awesome as the rest of the big leaguers of the Marines. Now after the two year time skip its all up in the air. Law is hella powerful and I don't think we've seen everything that Luffy has to offer currently. I think they should all be able to get their own few punches in to any of the Admirals but they're still a bit far off from being able to take one down like Whitebeard and possibly the rest of the Yonkou can.
I'm sorry, but I haven't seen a single character alone fighting with the ability to take down WB. I'm sure Gol D. was better, but those fights I or we, never saw, the skirmish with Shanks didn't end up being that brutal because both of them eventually had a part in the War, and both came intact and unbruised. Yes Akainau punched him in the chest twice, but IMHO that was 'assisted', basically in the middle of a war zone anyones vunerable. But one on one??? WB = nobody I've seen fight yet, hell if he were at full power I'd imagine that he'd have killed BB by power and ability. But his guts, I don't think he had the 'will' to kill any of his 'Sons', not even BB.