The dream fight between charging bulls will always be prime Tyson vs. prime Ibeabuchi. The thing that really distinguished Tyson and Marciano (to an extent Frazier, at least when not facing Foreman) was that their relative lack of a neck made their heads and bodies like shock absorbers. Prime Tyson was a nightmare matchup for everyone given his overwhelming speed at the time -- enabling him to surprise opponents with lightning-fast combos of hooks and upper cuts. Frankly, I see Marciano and Frazier as being sufficiently predictable such that Usyk could have managed them and achieved a decision.
Chisora, Joyce, and Gassiev are as good as you're gonna get. He handled them and had them going backwards. It's a rare style and increasingly more so because it is extremely difficult to become world level with. This is like critiquing Usyk for not defeating enough guys who shoulder roll.
He did face with a few in the amateurs. Nistor (WSB), Beterbiev (AMs), Joyce (WSB). Chisora and Briedis did in the pros, Gassiev also tried but he failed miserably.
Briedis, Mchunu and Hunter were pretty fast, I can't think of anyone with a big frame being faster than Usyk
You could say that Mchunu is both light on his feet and fast handed, maybe even more than Usyk, the only one with faster feet in the upper divisions than comes to my mind rn is Bivol and he is a small light heavyweight
The only active heavyweight that matches that Joe Frazier style is Richard Torrez Jr but he looked all sorts of meh in his last fight so I doubt he'd give Usyk a tough one regardless of style. He already beat Chisora, who's a good pressure fighter, better than the numbers suggest, so it's hard to say that style would automatically be kryptonite for Usyk.