For me its very hard to seperate my most wanted from the most realistic, which is partly why a lot of my most wanted have got in already. Not only does getting excited for a character that has a very low chance of getting in seem like a bit of waste for me personally, (I understand it may be different for others), but the realistic characters tend to have a large support base which makes them easier to root for. So more or less I do base my wants off of what would be most realistic in an actual smash game. However, another important factor I consider is how the new character would compliment our current roster, such as whether an area is lacking, or if that character would over represent a certain area. With that being said here are my short thoughts on each character submitted, because why not:
Jill & Drill Dozer: Would have both a unique playstyle, and appearance, but I can't see her being relevant enough to include, especially with her assist trophy not even being present in the last two installments.
Soda Popinski: One on my favorite Punch-Out!! boxers, but I don't think he's important enough compared to the other boxers to warrant his inclusion over any of the others. I also think Little Mac represents Punch-Out!! perfectly fine by himself
Guardian: Would actually be amazing to see, and I can see it having a really fun moveset, but I wouldn't want to replace the Zelda job with something else, and I also think the Guardian is out prioritized by some other characters which I'll get to.
Porky: Wouldn't mind him getting in, with him being the antagonist to both Ness and Lucas, as well as being a boss in Brawl. However, I do think his inclusion would be a bit predictable, given his lack of a spirit has fueled a lot of discussion over him being a bonus fighter. Furthermore, I think the MOTHER series is honestly already lucky to have 2 fighters as is, and considering the series has practically no future, I'm not sure it makes sense to include a full newcomer from it when there are only so many slots.
Lugia: Lugia is cool as a pokémon, but we just had a pokémon rep, and I'm not sure Lugia is really suited to be a fighter in the first place.
Max Brass: Max Brass is another character which I wouldn't mind, but I'm not sure the ARMS series needs another rep. If Min Min was in base game maybe, but I'm under the opinion that Min Min was the push for ARMS 2, and subsequently it wouldn't make much sense to include another ARMS character for the sequel.
Tiki: Tiki is one of the few FE characters I actually like, but I would like to see the FE job go through, so that I can hopefully be convinced that there is another FE character who truly deserves to be in smash.
Hades: I'm a big fan of his character, but with Medusa already in I think that would be a bit of a KI:U bloat.
Wolf Link & Midna: My second most wanted Zelda rep behind Skull Kid, but I do want to see a potential Zelda job just so we can dedicate some discourse to which Zelda rep should get in, as opposed to one just getting in here.
Edelgard: FE........ but definitely should've gotten in over Byleth
Kraid: Don't think we really need another Metroid character, but if we did it would probably be Sylux. a Godzilla Esque character would be cool though
Mach Rider: No thoughts, head empty. He's (She's?) alright but eh.
Shake King: Seems a bit irrelevant, and we've also already gotten Ashley and Waluigi, so I think Wario has enough company for now.
DJ Octavio: With Splatoon continuing to be pushed, I think another unique fighter is completely warranted. His villain status makes him the logical choice for said Splatoon newcomer imo. It also helps that Unlike The Squid Sisters and Off the Hook, DJ Octavio would be visually diverse from Inkling and Octoling.
Chain Chomp: I don't think I can handle another mario enemy getting in over an actual Mushroom Kingdom resident
Chibi Robo: Huge fan of him, but I do think he would be a lightweight. Even though he would be made of metal, I feel like the nature of him being tiny in his home game would lend more to him being a lightweight. I suppose we'll see based on the voting though.
Black Shadow: I do support his inclusion, although as an echo fighter and not a unique fighter, since I'm not sure F-Zero really needs a fully unique second rep.
Keep in mind that these are just my thoughts on the characters, and not the submitters nor the specific submissions. I'm also aware that there are quite a lot of counter arguments to these points, but in order to list my thoughts on each character I had to keep it somewhat brief. Overall I'm thinking Porky, Black Shadow, Wolf Link, and DJ Octavio will be the strongest contenders, although I can see people dumping their votes into one of the two FE reps to null the FE job, which I really hope doesn't happen, as the character then wouldn't be getting in on their own merits.