I'm not that big on rarity, and I have pretty much all the vintage figures I wanted when I started out, so I'd honestly have to go with Ishi Tib, from POTF2. I mean, I'm done with Episode 1 except for Sio Bibble and Holo Sidious, but I hope I'll eventually find them, and then Saga and POTJ I don't think I'd have as much trouble as finding the figure I most want: Ishi Tib.