I think you left out Charlie, Alph, and Brittany from Pikmin 3 in your pole.
I would like to see Ridley but him being a boss in Brawl kinda shot down his chances. However I know a lot of people were disappointed that Ridley did not make it in as a character.
As for the size problem:
Ridley in Melee intro scene
As for Star Fox: I am content with the current series representatives. I don't think they need anyone else.