Vyse From Skies of Arcadia
Hippy from Earthbound
Isaac from Golden Sun
Lloyd from Tales of Symphonia

The last two are stretches because the size differences between the evolutions. You expect Raichu and Wigglytuff to fit and be the exact size of Pikachu and JIgglyypuff, respectively, and act like palatte swaps? Palatte swaps are those who are around the same size and don't have signitificant differences between them. If Pichu were to return, I think it would be smaller than Pikachu because its a Baby Pokemon and it would have a trait that made it tough to use because Pichu, based on its nature, can't control its electricity well compared to Pikachu and Raichu, as shown in Melee.

I think the Inklings are a shoe-in in the next game. It just wasn't their time in Smash 4 so we can at least expect them in 5.

I also expect a new Zelda character, whether it be Linkle, Impa, or whatever.

I would like Isaac to comeback, this time as a playable character similar to Little Mac.

King K. Rool is a possibility, but I agree with PushDustin from SourceGaming that K. Rool may NOT be as recognizable as a character as we may assume.

There is also a possibility of a new FE character since the series is on the rise, finally after 25 years and 14 games. Hopefully, they'll bring something new to the table like Robin and Corrin.

I expect a character that is pretty out there in terms of possible moveset like Wii Fit Trainer and Duck Hunt.

As for third-party, they have to be at least recognizable in the industry as a whole. A couple of the characters mentioned in the OP (especially the 10 and 9 characters) are not really that possible since they're Playstation basically (at least Final Fantasy has a history with Nintendo before, and even after, going to Sony) and, unlike Cloud, they aren't as historic or legendary. I think Chun-Li, the Queen of Street Fighter who can complete the crossover duo with Ryu (and be played by Laura Bailey, who voiced Lucina), a Dragon Quest character,  another Final Fantasy character, and maybe one from Soul Calibur could be possible in the next Smash.

TBH, I don't understand the hatred towards the standard clone characters. Sakurai himself has stated that new characters with fully fleshed out movesets aren't being sacrificed for them; clone characters take up significantly fewer resources to create. You aren't losing out on King K. Rool or Inkling or whatever because Lucina, Dark Pit, Dr. Mario, and Roy are in the game. It's either those characters or likely nothing to replace them at all.

Corrin I can understand some of the disdain for, because admittedly America hadn't even gotten Fates yet and everybody obviously wanted Ridley, but that's a marketing ploy and Bayonetta was in there anyway so I think it at least evens out.

More FE characters!
Paper Mario and Metal Mario, we need more clones!!
Pichu!!

Fiora from Xenoblade Chronicles and Elma from Xenoblade Chronicles X are easily my two most wanted characters for Smash 5.

I'd also die for Crash Bandicoot, but I know for a fact that he is extremely unlikely.

Other characters I'd like to see include Zero from Mega Man X, the Inklings from Splatoon, the next Fire Emblem protagonist after Corrin, and perhaps another character from a niche Nintendo game.

Finally, a character that I do NOT want in Smash is Shovel Knight. I will literally quit gaming if he ever appears in Smash 5.

Oh, and I wouldn't mind Linkle as a possible Zelda newcomer.

"Can some of these be their own characters? Yeah. But not if they play exactly the same. If they play exactly the same, then make them palettes."

Only the most unfortunately hardcore will care about the size and attributes, everyone else will just be happy with the inclusion. 

Hell yeah! Easily on the top of my list too. That said, I still can't imagine Smash 5 having nearly the amazing lineup Smash 4 has. 

Some snowboard kids

I have thought about this as well and agree.

Also add in there:

Samus/Dark Samus (Metroid Prime)

Simon Belmont/Alucard (Castlevania)

Chrono (Chrono Trigger)/Randi (Secret of Mana)

Megaman/Zero (Megaman)

Inklings/Squid Sisters (Splatooon)

Ryota Hayami (Wave Race)/Akari Hayami (1080 Snowboarding)

Bill Rizer/Lance Bean (Contra)

Billy Lee/Jimmy Lee/Battletoads (Double Dragon/Battletoads)

More Metroid characters, and more from fire emblem just to see people get mad