Would beating undefeated champion Wilder in the US be Joshua's best win?

He had a war against a semi retired old Wlad.. people over rate that win

 

Yes. Undefeated prime 2019 Wilder > old inactive 40s Klitschko

 

Wlad, Parker, Povetkin and Ruiz would all have given even pre-Fury Wilder plenty of trouble most likely.

It would have been AJs biggest win in a commercial sense, but not necessarily the best opponent he beat.

 

that Klitschko who fought Joshua that night would of torched Wilder.

 

It was hardly the worst Wlad ever looked. He looked much worse against Fury and Bryant Jennings, his previous two fights. He looked completely shot and disinterested in both.

 

Those four guys all easily stop Wilder.

 

It depends on how he does it and what Wilder goes on to do afterwards in this timeline. But depending on these two things its a possibility. More likely its 2nd after Wlad, with 1st being best case and 3rd or 4th being worst case. Clearly the butterfly effect would make history go different after this.

The Wlad win is very open to interpretation. Hes the best HW post Lennox and AJ was the first to stop him in almost 15 years but Wlad was old. Wlad scored a knockdown. Does that knockdown show Wlad was still really good and we give Joshua credit or do we take away credit for Joshua getting knocked down by old Wlad? You can really look at that win a number of ways.

 

Wilder or Povetkin, I never rated Wlad, Wilder, Povetkin and AJ were only ever mid so...

 

By far. Even that two year lay off 41 year old Wlad was joshua’s hardest fight before Usyk.

 

Wilder is the one trick pony with excellent management that maximized it. You’re got to hand it to his team for how much money they helped him make, when in the end, he’s a mediocre fighter with an incredible right. Tons of heart and warrior spirit though, nothing but respect for that — the stuff some guys with more talent, like AJ, lack, Wilder has in spades.

 

They had willing accomplices amongst the fans. When he was like 40 fights in and they matched him against an aging former middleweight...should have been an indication to everyone that he sucked. The dive by Scott, the dive by Harrision that ended with the fight being stopped as Deontay flailed at air...

 

It is an interesting hypothetical, but we do know a venue was ready for April: Wembley stadium, UK. As fans had already started buying flights and hotels. Sadly, Wilder couldn't agree terms with DAZN and turned down a deal he likely regrets.

At that stage going into April 2019, the rankings were:
#1 Joshua
#2 Fury
#3 Wilder
(Ring and TBRB)

A lot of the shine had been taken off Wilder by Fury in that "draw"

But let's look at your hypothetical situation. Well one thing you left out was Wilder was favourite over Fury because of what happened in the Wallin fight. Many were worried that Wilder would be able to target the cut. But if we look at the rankings, going into June 2019, then we understand how Wilder was still seen as #3.

So the question becomes, is beating #3 Wilder better than beating Wlad. I don't actually think Wilder is better at that stage due to what an out of shape Fury had done to Wilder in their "draw". However, with the context of Undisputed... that is what makes the question interesting.

Unfortunately, this is all a hypothetical, and what we do know is: Joshua lost to Ruiz, before then beating him; Wilder lost to Fury, before then losing to Fury again.