near as i can tell nimrod used a form of sonics, AND another weapon. i dont have the scans or the comic anymore, but i'm pretty sure that it stated pretty clearly that he used 2 weapons. one was a nueral impactor or something similar? anybody have the issue they could check? it didnt ko him either if memory serves correctly. it jammed his neural impulses from his neck down. effectively paralyzing him. i dont even think it hurt him? but i'm just running off memory now as i dont have my collection anymore (house fire).
also, onlsaught was never seen on panel physically ko'ing juggernaut. the only interaction they had was when onslaught was holding juggernaut like a play toy. even then juggernaut didnt have his helmet, and onslaughts phsychic mist manifested he was already warping juggernauts perception. the other incident is COMPLETELY off panel and you have no way to prove or disprove what had happened up to the point of juggernaut landing in front of beast and bishop?.
nobody else has harmed juggernaut (aside from magic) let alone enough to ko him 😉