Corrections, he beat Blue Marvel who snuck attacked him and he had the advantage against both of the Hyperions (while taking on the Exiles as well). The only time they gained an advantage was when Blink teleported sand into him. No one during that story line was able to go solo against King Hyperion, no one.
Correction. Blue Marvel was hardly beaten, and if he was it would have taken more time than it did for him to get back up. He was KO'd but before this he wasn't even ready to fight, but instead decided to try and talk KH down. We see what happened when he was ready to fight. The simple fact that Adam was able to get up from the beating that he took, while KH wasn't shows what would have happened if they began punching at the same time.