Yes, I am going off the representation of how Tiger and dragon are used in most works of fiction that is drawn from the Mythology, because One Piece is a fictional story, and the characters involved fall into the category of the trope. That is how most Authors, writers, story tellers, video game creators, etc.. tend to portray the Tiger vs the Dragon concept from Chinese Mythology. Personality wise, Luffy falls under the Tiger aspect of this trope, while Zoro falls under the Dragon aspect. In this regard, we can actually say this is one of the rare occasions where there are two characters within this same trope, represented by each beast, that are on the same side. From a conflict standpoint within the series however, Kaido would be the Dragon.
No you're going based off of the statement made by a dude in an article of the various trope websites that copy pasted the same article across their 3-4 different sites. In one of the sites that actually gives the examples if you end up going through them, you'll realize the examples themselves don't follow their statement about the personality traits mentioned, only very few do. On top of that the personalities mentioned in the article by whoever wrote it for tvtropes is based on characters in few works of fictions where a Tiger vs Dragon was used, it's derivative is not the actual mythos when it comes to personality. If we're discussing actual mythos personality of the Tiger, then I'd look at the personality traits I mentioned earlier.
Luffy will never be represented by the Tiger, the monkey is reserved for him no matter the scenario. Highly doubt Oda would ever put him in a situation where he'd represent the Tiger or the Dragon. It seems like you're pretty convinced on not realizing that Luffy doesn't possess the qualities of the Dragon from the actual mythos. So you're just forcing him into a Tiger vs Dragon situation simply because you don't want Zoro being in one against Kaido lol. And even in the tvtropes list of personalities of the Tiger, Zoro fits that to the T as already pointed by few examples by myself and few other individuals.
This is just one iteration of the Mythos, out of countless. In most iterations, the Dragon Emperor is actually beloved by his people, and brings harmony and prosperity to those he rules over. Most Dragon's that are portrayed as "Evil", are actually those from the Western Hemisphere. In Eastern Asia depictions, Dragons are revered by the people.
There aren't really countless symbolic mythos of symbolism regarding the Dragon/Tiger. There are ones that have the Tiger & Dragon on their own, there's ones based on the uniting of the Tiger & Dragon together, and then of course the one being discussed here Tiger vs Dragon. In the Tiger vs Dragon mytho of symbolism, Tiger is the force that challenges the mighty Dragon from encompassing all.
Individual mythos of the Dragon, you're right that's how they're revered. And that's how they're revered in the mythos about the uniting between the Dragon & the Tiger. In a "VS" the symbolism of the Dragon is different.
And not for nothing, but the Yamato no Orochi is considered a Dragon of Eastern Origins, and Oda has done more to build up a conflict between Zoro and Orochi, than he has between Zoro and Kaido. Orochi is the one who snatched the land from the Kozuki Clan, and rules over it with the backing of Kaido. It is Orochi's actions that lead to the downfall of the Kozuki Clan, and the death of Oden. Orochi is the one who executed Yasui, and now has ordered the execution of Momonosuke, the last surviving Heir of the Kozuki Clan.
This is also a perfect setup for Zoro to be able to behead a dragon, without actually killing anyone, as we all know Oda is not a fan of having his protagonist kill anyone. The Yamato no Orochi is known for being able to regenerate it's heads. Something Oda can use to his advantage to still draw the parallels between Zoro and Ryuma, without having Zoro kill.
We are almost 80 chapters deep into Wano, with zero build up of a Zoro and Kaido confrontation, with tons of build up of a Zoro and Orochi confrontation. When is Oda going to start this Kaido/Zoro build up?
In the series Yamato no Orochi is not a Dragon. Thus he's automatically excluded. It is also false that Oda has done more to build up a conflict between Zoro and Orochi than he has between Zoro and Kaido.
Orochi is the one who snatched the land from from Kozuki clan = Nothing to do with Zoro
Orochi's actions lead to downfall of Kozuki = Nothing to do with Zoro
Death of Oden = Yup, and that same Oden considered Kaido the big threat and main problem
Killed Yasu = Yup, and that same Yasu considered Kaido the big threat and main problem
Execuetion of last surviving heir of Kozuki = Momo's own issue, not Zoro's.
What you're describing sets Orochi to be defeated by Momonosuke, who will avenge his father and reclaim the throne of the Shogun from Orochi. Which is further cemented by the fact he's inherited the sword that's related to slaying Orochi (will be coming back to this later).
Now you're saying there's more for Orochi vs Zoro than Kaido vs Zoro? I don't see how that can be true. And that there's zero build up of a Zoro and Kaido confrontation, even after all that I described in the previous post? Hmm alright let's do it in a list way.
- Inherited Ryuuma's sword who is renowned for slaying a Dragon in the capital of Wano.
- Ended up with Oden's sword which has been correlated to hurting Kaido
^^^ Ended up with swords relating two people who've fought against Dragons.
- Magazine comment of a new legend of an eastern dragon being slain possibly being born
- Trained with the sword that's been correlated directly cutting up Kaido..
- Is focused on when Yasu talks about no one being able to take Kaido's head for 20 years
As far as Oda killing Kaido or not with Zoro.. He starts the Wano arc off by having Zoro kill a dude cold-bloodily, so Zoro sending Kaido's head flying at the end, killing Kaido, wouldn't be surprising.
If you ask me, you have the guy who will slay Orochi & the guy who will slay Kaido training together in this panel, the heir of the Kozuki & the heir of the Shimotsuki:
Is Momo ready yet to weild the sword? we don't know he shrugged it off because of fear. But as the arc continues, in fact from Zou, Oda has been developing Momo to have more courage. Which he continues to showcase as the arc continues furthermore. Him picking up the sword his dad entrusted to him to slay Orochi would be the close up to his story.