Archie never lost the World Light Heavyweight Title in the ring.He got stripped, by what was called the NBA back then.He won the title in 1952 and defended it 8 times, the last in 1961.In between light heavyweight title fights he beat a lot of the top heavys of the day, including Nino Valdez, who was seemingly being avoided by Marciano's management.Archie beat Valdez twice, and that earned him a 1955 shot at Marciano.Arch lost, but was light heavy champ for another 6 years.Archie was also the all time knockout king, scoring 131 career knockouts. You ask "how good was Archie Moore?" He was damned good, an ATG.
Post war he's pound for pound top 15 without question. All in, he's top 30 also without question. I'd have him top 10 and top 20 personally.
Put it this way - anytime you pick any fighter to beat Moore in a fantasy fight you know you're playing the %, because he has a chance with anyone. The only guy who really had his number was fellow ATG Charles, and there seems to be some static surrounding his wins over Moore.
He was indeed an all time great Just a couple things; the NYSAC and EBU stripped him of his title on Feb 10th 1962, not the NBA who already had stripped Moore of their title and Harold Johnson had won the belt and defended twice in 1961. And although for moment Moore is indeed the 'KO' King, I think with the research being done, Jimmy Wilde will be taking that title away from him soon.
Just look at the OLD mongooses record, and what it took him to get a shot, he was head and shoulders above the rest
How good was Moore? ~ Good enough to be avoided like the plague throughout the 1940's by the reigning light heavyweight champions. And, good enough to hold the Light Heavyweight title for close to a decade at an age when most fighters are comtemplating retirement (and that holds true even today). He holds the all-time record for knockouts, and, he was still rated as a heavyweight contender when he was well into his fourties. So...he was, indeed, pretty good.