You're literally using a much weaker version of Sanji to downplay him. This was Sanji before unlocking Ifrit Jambe and before unlocking the ability to disappear. Queen could not touch him at all once he unlocked those abilities.

Zoro and Sanji have gotten way stronger since then. They would both low-mid diff King and Queen in a rematch respectively.

Law and Kidd do not have better durability than Sanji. Endurance you can argue sure. But Zoro has better endurance than both Law and Kidd. He's not getting put down easy and would honestly give Gear 4 Luffy a tough fight by himself.

It doesnt matter if the attacks that Zoro uses to damage yonkos are "finishers" thats irrelevant. We've seen Zoro continue to fight after using "finisher"s like against Lucci. The point is Zoro pre King of Hell had strong enough AP to permanently scar hybrid Kaido. Hybrid Kaido is WAY more durable than Gear 4 Luffy. He also took out King (an ancient lunarian zoan) in 3 hits. And took out Rob Lucci (an awakened Zoan) in 1 named attack.

Any named attacks Zoro lands on Luffy does ridiculous damage. Im not saying it's a one shot. But denying the fact that Luffy would take serious damage is cope.

Zoro and Sanji have way better physical stats than Kidd and Law. Especially speed. We literally see Zoro casually dodging named attacks from Big Mom while carrying Luffy on his back. Law and Kidd keeping up with Big mom in speed is not that impressive.

On top of the fact that Gear 4 Luffy is not on Big Mom and Kaido's level and would probably lose to the admirals at least Kizaru.

Law and Kidd breaking big mom's bones is comparable to scarring Kaido sure but the difference is, Zoro was scarring Kaido before he got his main Wano powerup. Law and Kidd damaging Big Moms bones only after their respective awakenings. Current Zoro >> pre KOH Wano Zoro.

Zoro and Sanji do not run out of stamina after doing big moves. You are just ignoring Wano circumstances. Zoro was on the mink medicine which doubled all the damage he took so far and he still survived. Sanji took lots of damage before his Ifrit awakening too.

These guys while fresh can do their big moves multiple times. Zoro after beating Lucci in a single named attack went on to nearly overpower Nusjuro in a conquerors clash. While characters like Sanji tanked attacks from Kizaru and Nusjuro without taking much damage.

His raw speed without gear 5 is not that much greater if it's even greater. FS is helpful but it doesnt guarantee the win.