Depends, Goto and his entire guild might get their butts kicked front-ways and sideways. But if it is the scavengers guild then they may have cleared the castle albeit with slight difficulties (Mind you that Baran was the weakest of the monarchs and a still growing MC managed to take him down, and Thomas was hell of a lot stronger when he faced the MC when Jin was at level 122+ and he still got his hands hurt trying to fight Thomas). However, if the Giant King wasn’t shackled in those chains in that Tokyo gate, boy o boy, you don’t wanna be Legia`s target.
after watching the power of the Demon King who almost killed Sung Jin Woo in several chances in their fight, these bunch of S-Class hunters don’t look that impressive anymore.. I guess if each of them bring a team of strongest non S-class, try to raid the demon tower, they’ll get annihilated on 90s floor..