Thats a good point every coc user who serves below someone only serves beneath another coc user.
Such as Zoro and Rayleigh.
Unless the CDs are coc users the admirals are likely to not be conquerors themselves.
New Additions to your list
1. Kaido is not the World's Strongest
2. No Databook mentioned Kaido's title
3. King will never fight Zoro
4. Wings refers to only Sanji and not Zoro
5. Carrot joins the crew
7. Kaido does not have hybrid form
8. Calamities do not have hybrid forms.
9. Tejas thinks that Sanji can defeat Kaido
10. Asura kills Kaido
11. Purgatory Onigiri destroys King
12. King is weaker than Doflamingo
13. Akainu is stronger than Kaido
14. Tejas thinks that Zoro can not defeat King.
15. Akainu damaged Marco
16. Kizaru destroys EoW Zoro
Is this based off the notion they fought 1v1? Because that doesn't necessarily implicate Kizaru was not Aokiji level, it was merely a battle of ideologies from what I recall, nor indicating they got the strongest will. Although if I had to bet Akainu does out of all admirals.