Is your point that CoC is hereditary or based on a hierarchical leader role? If not, what exactly is your specific requirement for it?
I find the claim of
@HeroesNZ that Law has shown better justification for CoC in every sense, over Sanji… outright ridiculous.
Sanji maintained an impossible lifelong dream through abuse, escaped Germa to choose his own identity, led the Curly Hat group, repeatedly faced hopeless opponents and offered his life for Luffy. Law wins status and formal command. Sanji compares strongly in will, guts, leadership under pressure and personal conviction.