Well, i will mention Zoro Fight for now: (Please read everything)
Zoro's Animal Theme is Tiger, however that isn't Accurate
Zoro to be Exact is associated with Four Beings ---> Shark - Tiger - Dragon & finally Demon
First Three represent Sea - Land - Sky while Demon represent the Whole Three
This is clearly demonstrated by Zoro's Asura where Zoro becomes Three Persons in One, & also him being a Santoryu User
Zoro's entire Journey is about reaching this Demon Level & he must do that by Surpassing the other Three
For now, his Asura is not Fully Mastered & he once he does so, it won't show as Three Persons, but he will appear as Singular but with Asura AP & Stats
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Post-TS, there were Three Major Arcs (For Zoro, so WCI doesn't count), they are: Fishmen Island, Dressrosa & Wano
The Rest were just Tie-Ins to these Major Three Arcs. Fishmen Island represents Water Island, Dressrosa represents Earth Island & Onigashima Raid represent Sky Island
Remember Zoro's Animals i just mentioned?
Well, Zoro fought Hody in Fishmen Island who represent Great White Shark, he also fought Fujitora in Dressrosa who represent Tiger & also fought Kaido who represent Dragon, however they were all Short Fights. His real Victories were against their Allies:
Hyouzou ---> Fishmen Island Swordsman ---> Represents Water Blade User
Pica ---> Dressrosa Golem ---> Represents Earth/Land Blade User
King ---> Onigashima Bird ---> Represents Sky Blade User
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So Zoro's Fights are following his Animal Themes & Three Planes of Land, Sea & Air.
This kind of Treatment also happened Pre-TS, where Zoro fought Hatchan, Mr. 1 & Ohm (Who represent Water, Land & Sky)
After these, it was Enies Lobby Fight, who was his opponent? It was Kaku?
Do you know what's interesting about Kaku? He is Combination of all Three
Hatchan Fight was about Fighting an Opponent with "More Swords"
Mr. 1 Fight was about Fighting an Opponent with "Hard to Cut Body"
Ohm Fight was about Fighting an Opponent with "Higher Range"
Kaku Fight was literally Combination of these Three Challenges, he was Four-Sword Style User + He kept Switching between Tekkai & Normal Mode to make Zoro's BOAT not work & he kept damaging Zoro with Ranged Attacks (He is Rankyaku Specialist), and conveniently, it was the Fight where Zoro unlocked Asura which as i said before, represents Zoro's Trion Spirit
This is also why Zoro is associated with the Cross & Jesus References, he was Found on a Cross, the Two Shichibukai who Defeated him (Mihawk & Kuma) had Cross & Bible respectively, when he fell on Mihawk's Island, he found Giant Cross, after Roof Battle he was bandaged in Cross Form & while he was like that, the Shogi Table showed Alliance in Cross Shape.
That's because Zoro just like Christianity represents a Trion Spirited Individual, but in this case it's about Water/Shark, Land/Tiger, Sky/Dragon which combine to create a Demon.
Also this explains why when Oda was asked to give DFs to rest of SHs, he said Zoro would have Kaido's DF, but Oda prefers to give it to One of his Swords, cuz as i said Zoro = Demon & his Santoryu = Three Strongest Animals/Three Realms
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So based on this, after King & before Final War (In other words, before Zoro is Finally Prepared to free the World with Luffy)
There are still Two Fights for him to Fully Master his Willpower (Btw, after Mihawk Defeated Zoro, he didn't tell him Train or improve your Swordsmanship to Surpass Me, he told him to Master his Will !!! Cuz Mihawk saw Zoro's Trion Spirit which is an Overwhelming Form of CoC & knew that this is the Man who if he masters his CoC, can be the Fight he dreams of)
These Two Fights are:
Someone who represents Sea, Land & Sky & by Slaying him, it means Zoro has completed First Part of his Journey, which is Conquering Animal Kingdom (This is also why Zoro have Attacks named after more than a Dozen Animal)
Conveniently there is a Guy who not only is known as Strongest in Sea, Land & Sky, not only he is Fish + Man + Dragon, not only he is a Demon/Oni, not only he is Leader of Animal Kingdom/Beasts Pirates, but he is actually not far from Zoro currently & Half OP Fandom have already stated Dozens of Reasons why Zoro will Kill him. It's obviously "Kaido"
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As for the Second Fight, it's someone who is Combination of Hyouzou, Pica & King
Someone who also represent Demon + Sea/Land/Sky Creatures
The reason this Fight exist even though Zoro is gonna Slay Kaido is for same reason Zoro clashed with Hody & Fujitora
It's cuz the First Fight wasn't Fully Fair or against the Opponent in his Strongest Form, while Second One is Fair Fight
Zoro Defeating Hody, Clashing with Fuji & Slaying Kaido aren't Fully Fair Fights & not against them in All Out Mode
But Hyouzou, Pica & King are Fair 1 v 1 Fights where Zoro proves his Superiority at the end
Just like Kaku had Advantages of Hatchan + Mr. 1 + Ohm
This Character also have Advantages of these Characters:
1. Hyouzou Fight was very Short, but what stands out about him was Using "Poison"
2. Pica Fight wasn't Short but it was Long, because Pica was "Hiding behind Stone"
3. King Fight seem to be Difficult, and what's challenging about it is "Versatility & Brutal Aggression"
Do you know who is Character who uses Poison + Untouchable due to Hiding behind something + is Versatile & Very Brutal like King??
Someone who represents a Demon? Someone who is King of Hell/Devils just like Kaido is King of Beasts, so Zoro must Surpass him?
It's none other than "Magellan" !!!
And guess what? Magellan have Four Major Techniques:
Hydra ---> Which Translates to Poison "Dragon"
Doku Fugu ---> Which Translates to Poison Blow"Fish"
Doku Gumo ---> Which Translates to Poison "Spider"
All three representing Sky, Sea & Land
And finally Magellan's Ultimate Technique which is Venom "Demon" (Jigoku No Shinpan)
He is literally made to Fight Zoro
ZORO vs MAGELLAN INCOMING
Other two Fights are Equally Exciting !!!