Oh sweet, another chance to do a huge write up, and on a day I'm off work nonetheless. Lets go!
Gonna start off by saying that like none of my most wanted characters are probably even wants by the majority of people here, but might as well throw some names out and get going on it. Characters I really wanted in so far are Jill and Waluigi. Crash is also up there but he's not really one of my most wanted as he just a character who I wanted to see in the game. While you could go any direct direction between the 3 protagonists or a Big Daddy, I think Booker and Elizabeth is the way to go because of how unique the moveset would be.
Booker/Elizabeth(Bioshock) - I already did a huge write up on them fairly recently, my main thing is that Bioshock is such a huge and iconic series that I think it's earned a place in Smash. It appears to have worldwide appeal(only data I can find is that the collection did well in Japan, obviously it did well in the west). The series itself is highly regarded by many as one of the big ones of the late 2000s and early 2010s, and it really feels like the only reason it isn't in Smash or even talked about is because it's from the west, which in my opinion is a dumb reason for it to not being in the conversation.
A Far Cry Rep(Probably Vaas Montenegro) - There's a couple reasons I'd really like to see Far Cry in Smash. First, it's because I fell in love with the series last year during lockdown stuff. I really enjoyed the stories, characters, and the gameplay of 3-5 and will buy 6 when it comes out. The characters are who stood out to me the most though, especially the villains. Vaas, Pagan Min, and Joseph Seed were all just fantastically written villains who I actually wanted to kill. Of those 3 though Vaas stood out to me the most. I'll avoid spoilers here, but watching him develop into what he became while you hunted him down to kill him was a lot of fun. Now that he's going to be a playable character in the FC6 DLC there will actually be some official stuff to work with too. While Far Cry doesn't have a ton of Nintendo presence, the series is pretty big world wide and it's developed by Ubisoft who has great connections with Nintendo. Shockingly as well, 3-5 sold very well in Japan. Given that Japan usually doesn't like FPS games or western games that's a very big point in it's favor. It's another series that just like Bioshock, has a lot in it's favor but gets very little play in the Smash spec scene.
Phoenix Wright - Sadly he's DQd until DLC, but given that I really wanted Jill and Resident Evil in the game then I'm good with it. I would like Phoenix in Smash for a few simple reason. I loved the series and the characters, and I also would just really like to see how he fights in the game. Sometimes characters like his are really fun additions given that he doesn't do much fighting in the game.
The Knight/Hollow Knight - If we didn't already get Reimu I'd be arguing that The Knight should be the first indie to be playable. While there are others who are more highly requested, I feel as if Hollow Knight and Team Cherry have practically been adopted by Nintendo. They've been on a lot of promotional stuff, including the Nintendo x China presentation and last years "what's coming in 2020" stuff pre covid. It just very much feels like a strong relationship there. Also, lets not forget about the character itself. Hollow Knight would bring a fairly unique moveset and content that would feel pretty different than most of what we have in Smash as far as music and stage artwork would go.
Officer Howard/Akira Howard - So look, this one is an odd case. I didn't like Astral Chain when I played it because I thought the combat wasn't fun, and I also don't think that I would want to play as them in Smash given that they'd likely be extremely combo based. But with Astral Chain pretty much being the biggest 1st party series without a playable character I just feel like it would be a pretty big flop if we didn't add them in. Ring Fit Trainee is like this as well for me but to as lesser extent. It feels like Nintendo is sold on the series, so Astral Chain not getting a playable rep in Smash with it's status being where it's at would just feel wrong.
Nathan Drake - Saved this one for last since it's likely never happening even in a game like this, but Uncharted is easily one of the biggest series from both Sony and in general in gaming. Should we get a Sony rep in Smash it feels like it should be him or Kratos. Ill try not to overshare but I played the series during on of the most sucky points of my life and it made those terrible days just a little bit better for me, which is why I have a huge attachment to the series. So seeing Nathan and Uncharted in one of my favorite game series ever would be one of the coolest things I can think of.
HMs to Maxwell, Monokuma, League of Legends, Scorpion, Spyro, Dovahkiin, Lara Croft, and Master Chief