Who else would beat Wilder right now?

Why not?
BJS looks that had very sound and courageous opinions about DD quitting and also about DD.
BJS also looks that already had at least a bit questionable reputation in british social media long before Canelo fight.
Enough brits are a bit happy that BJS get cool treatment and even are posting that he had get what he had deserved.
His behavior in social media and life looks that was not at all ideal and it is what it is there even with 0 fight vs Canelo.

You might visit british forums and lurk in mass media, social media forums etc like things long before this fight vs Canelo had happened.

 

The state of Deontay Wilder and who could beat him now is a tough question. Boxing has such a strong psychological dimension and Wilder lost his relationship to sanity after Fury 2; his Biblical ranting, accusations of Fury cheating, betrayal of his trainer and whining about not getting a Fury 3 diminished him greatly. In Ortiz 2 he looked average, managed to get his one punch in. His big rights in Fury 2 landed pretty hard on a few occasions and he didn't faze Fury. I don't think he has the discipline to keep up a 12 round strategy against Fury or anyone, but how good are the others?
1. Joshua is still an unknown. Appreciate that he took his loss like a man. Ruiz 2 was a clinic, not a fight, Pulev was a careful, measured win, little passion, little resistance. A warm up fight but for who? The best fight out there might be Joshua vs. Wilder - would the big right finish Joshua? Could Joshua break through and hurt Wilder or outbox him for 12 rounds? The truth is I still don't know what happened to Joshua in NYC in Ruiz 1. There's part of that story they've managed to keep secret. AJ looked spooked from the first camera shot.
2. Usyk doesn't hit hard enough, Wilder finds the range for a KO.
3. Dillian Whyte will brawl, make faces, act tough, make too many mistakes, Wilder steamrolls him late. A dirty fight.
4. Joseph Parker, nice guy, Wilder walks through him, KO late. Parker is like Danny Garcia in the welterweights. Has skills, gives you the effort, will fall short to the top guys.
5. I've been wrong every time about Joyce, still don't get it, Wilder KOs him by the 3rd. Slowest upper-ranked boxer in history. Stands right in front of opponents.
6. Michael Hunter is a cruiserweight, has nothing to deter Wilder, for some reason he and Usyk are the only ones on every list.
7. Andy Ruiz. Hmmmm. A hard one. Definite skills, good at everything, great at nothing. Had to get up off the canvas with AJ, then Arreola, has poise and mental strength. A little predictable with his left-right flurries, easy to time, might be a set-up for Wilder, I see the big right crashing through and sending Ruiz down. His new trainer Eddie Reynoso is trying some interesting things with Ruiz, who I fear may have peaked with his win over Joshua - he may fear it as well. A Wilder fight would be a big test for both men.

All of this supposes we have a sane, trained, in-shape Wilder in the ring. An Andy Ruiz fight would tell us more about Wilder than a Fury fight, as I expect Fury to beat him fairly easily and we may have a broken Wilder after that and he might retire. A Whyte battle would pit two hothead strongmen against each other, could end in a DQ, could be entertaining, though. Up and comers Fillip Hrgovic, Efe Ajagba, Frank Sanchez probably not ready. Why is Charles Martin #2 in the IBF and #4 in the WBA and appears nowhere else? Tyson Fury is either the champion or left off the list entirely - how would you like to be an official at either the IBF or the WBA and explain to a boxing fan that Charles Martin and Adam Kownacki are ranked but not Tyson Fury?