Right now :

1. Inoue
2. Crawford
3. Usyk

After fighting each other if they are shrink/grow at the same size :

The Monster stops Usyk.
Bud embarrass Usyk.
Bivol win by wide UD against Usyk.
Beterbiev put Usyk into the coma.
Other fighters like Tank or Shakur might beat Usyk.
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Loma wouldn't fight Usyk for obvious reasons.
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Usyk would beat Ginger though.