My pick for a Zelda Rep is Link, from specifically Majora's Mask, i.e. Pokemon Trainer, but with Zelda races. He'd cycle between his three transformations, being Deku, Zora and finally Goron.
I always liked the idea, because it wouldn't just represent Majora's Mask, but also Dekus, Zoras, and Gorons, which are recurring things from the series as a whole. Having a playable Goron alone would be could be pretty unique.
Also I just prefer movesets that are representative of character's ingame abilities, as opposed to completely original movesets like Sheik. Which is why I like this idea more than having Impa or Skullkid.
But more than anything, I just want Ganondorf to not be a semiclone of Captain Falcon.