@Nihion
This is just the most hysterical bit of writing ever:
He (Jango) certainly doesn’t act like a Mandalorian, as he seems like more of a loner, in a different way than Mando. Almec also noted that Jango is not likely a Mandalorian. Jango’s armor is even made up of a different material, not Beskar. These facts make it seem to me that he is in fact not a Mandalorian.
So we have here:
1. Jango is a loner and the character named "The Mandalorian" is also a loner.
2. Jango being a loner happens in a bit of different way than one single other Mandalorian, and if there's anything we know about a planet full of people it's that all the loners from the same planet are loners in exactly the same way.
3. Jango's armor is not made of Beskar, but he is seeking high-paying jobs and we don't know what he's going to use the money for
4. The Mandalorian's armor is not made of Beskar, but he is seeking high-paying jobs and using the money to slowly replace the other materials in his armor with Beskar.
You sum up by saying these 4 facts tell you that Jango "is in fact not a Mandalorian".
Okay, but I don't think I'd rest an argument on "They're both loners, but they're a little different from each other in how they approach being a loner," or even on, "Neither one started out with Beskar armor, they both went seeking high paying jobs, then one of them used his professional success to gain some Beskar and add some of that sweet Beskar to a few places in his armor, like one shoulder and a chest plate, while the other died before we ever got to see what he was going to spend his money on, therefore they can't be from the same planetary system."
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Separately, and for everyone, it's quite clear from the source material that characters in-universe use "Mandalorian" in two separate ways, one meaning "born on Mandalore or in the Mandalorian system" and the other meaning "part of the Mandalorian warrior culture". Even in the Mandalorian warrior culture you had people like most of Death Watch that were not loners, who operated as an integrated army, and The Mandalorian from the show, who was adopted into the warrior culture, indeed his only claim to being a Mandalorian is that he is part of the warrior culture, and he's a Bounty Hunter who is such a loner he's actually kind of surprised that all the other local Mandalorians would show up to help him renege on a contract. It's like his version of being a mandalorian doesn't have anything to do with being part of a larger, coordinated army.
Given that we haven't even established what definition of "Mandalorian" would be used for the tag (1. Born in the system, 2. Part of a Mandalorian army, or 3. Part of the Mandalorian warrior culture in the broadest sense) no one is going to be able to agree on who is in and who is out.
If #1, then Boba is out: He was born on Camino. You know who else is out? The Mandalorian.
If #2, then Sabine, the Armorer, Boba, Jango, and even "The Mandalorian" are out.
If #3, then everyone is in, because "being a loner in a slightly different way" isn't enough to make you not part of the warrior culture as a whole when that culture ranges from lone bounty hunters to army drill sergeants. Unless, of course, I'm forgetting someone born in the Mandalorian system who is also a pacifist or something.
Since the Mandalorian is excluded on both definition #1 and definition #2, I humbly suggest that the only reasonable definition to use as the basis for a faction tag in SWGOH is definition #3, and everyone is in.
...Finally, I also suggest that they don't add a Mandalorian tag until they add the character of The Armorer, and make her a support with some similarities to Wat Tambor, but who can actually fight on her own and who can't give out her equipment to anyone who doesn't have the Mandalorian tag.