Most skilled: Ezzard Charles, Archie Moore, Jersey Joe Walcott, or Harold Johnson

I feel like Archie Moore had the most tricks up his sleeve, he has so many tricks, he could give you nudge on the inside to create room to get punches off, he could jab, lean to his right to set up lead left hooks or rights over the jab, he could counter, he could do more with his body and foot movement to create opportunities to bait opponents, he was technically better and had better ring IQ than Charles, but Charles was more athletic, hence why Charles beat him at his peak, but Moore had a lot more longevity.
Charles is the P4P out of these, because athleticism is part of your arsenal, but going simply off of technical ability, ring IQ, tricks etc, it’s Moore.
Technically: Moore
P4P H2H: Charles
Literal H2H: Walcott
P4P ranking: Charles/Moore