If zoro was in WCI, he would have fought Cracker/Smoothie but not Kata , the same way he fought Pica not Doffy... he didnt even fight Doffy's YC1 , Vergo!
In wano, he wouldn't fight and beat King or Queen if they happen to have CoC.
Zoro would fight the swordmen/sword user who are usually a tier/2 tiers below the conqueror that Luffy fights.
Sanji gets to fight people slightly below Zoro's opponents or equal.
NW versions:
Along: Hody
Buggy :Caesar..."clowns"
Crocodile : Doffy...no need to explain
Lucci + Enel : Katakuri (being logialike with Great CoO and maching luffy gears.)
Oars + WB : Kaido ...WS hype and have oars looks too
Moriah + WB : Linlin ... should I explain?
Kaku : Queen
King : Jabra
BM : Khalifa
...
Doffy >> Vergo > Pica.
Doffy >= Hancock > rest of orginal warlords except Mihawk maybe.
Kata >> Smoothie >= Cracker / King>=Queen /Marco =Jozu
Kaido >> King >= Queen
Teach >> Shiryu
We know Doffy is viewed around Cracker by Linlin while he is clearly above Jozu.
But where does Marco/King/Queen with doffy?
Will zoro and Sanji surpass Doffy then commander version of Kata?
most likely when they beat King and Queen , they will be around/above doffy then when they beat Shiryu who might be inbetweener and Burgess , Zoro will be inbetweener /low top while sanji will be Top high tier
Surpassing Conquerors is Luffy's job during an arc/a saga
Zoro and Sanji won't have such privilege until EoS/End of yonko saga where they will be shown clearly above Doffy and Commander Kata.
None of them is gonna surpass Yonko except Luffy.
They just can't beat Doffy yet... unless you believe Wano zoro and sanji AP > Law gk + g4 attacks
They surely can't Hurt or beat Kata yet... none of them can beat even base kata coz they lack the attack speed and CoO + AP.
Zoro and Sanji are not gonna close the gap coz they will be struggling with people twice weaker/a tier below Luffy's opponents.
Stay Salty or Be sane
Wano ended 
