While I understand your reasoning and thought process, Fury has been active more recently than both Wilder and Ruiz.
They all don’t fight enough. Except Joshua. There is a lot that can be said to detract from Joshua, but he does actually fight on a somewhat acceptable regular basis.
Ajagba has made some real progress in the boxing skills department. He was the last guy expected that from but he did.
1 usyk 2 wilder 3 zhang 4 hrgovic 5 Joyce 6 ruiz 7 chisora 8 Makhmudov 9. AJ 10. maybe Anderson? Sanchez? If Fury wasn't retired/ducking he would go second and Aj just about makes 10
01 - Usyk 02 - Fury 03 - AJ 04 - Wilder 05 - Zhang 06 - Joyce 07 - Hrgovic. 08 - Ruiz 09 - Parker 10 - Anderson