This is a Yonkoutard type of flowchart. All of these guys have dfs that would far overshadow any haki usage in their fights. Don't let Kaidou's shitty built in offense fool you, he needed every bit of that to compensate for a lack of offense. Heck even Big Mom put her DF > advCoC and she still ended up with sorry potency.
Akainu's ability was hyped on its own as the most offensive one, and he himself told Jimbe that as a former warlord he should know the power he wielded. Superior portrayal when he fucked up the WBPs and had BPPs flee him. Garp's portrayal with Roger is enough.
Rest of the bunch more or less have the same potency/effectiveness in their fruits, with Fujitora and Sengoku arguably having the weakest fruits but they're still broken in their own way, so CoC can edge it in their favor potentially.
Sengoku already has the portrayal he needs, but Fujitora is this high simply because of his unbreakable defense. With that level of CoO and a fruit that can push back anything it's hard to imagine someone beating him. Add my personal CoC headcanon and he's a copy of Sengoku. Definitely the future FA imo.
But at the end of the day there are for sure different tiers within them, Garp & Sengoku made it past this age for a reason, even Kong mentioned how these two specifically carried the marines for all these years.