I have to disagree with a point there Scott. In my experience, Vader does pretty well against Yoda. And as much frustration we have with Vader, his list of managable victories is decent:

-Luke Skywalker and Princess Leia

Vader seems designed specifically to defeat this deck.

-Emperor Palpatine and Royal Guards

Sidious can't do 20 HP of damage quick enough, he just can't. And this guards are toast before they can do much anyhow.

-Jango Fett and Zam Wessel

This is a great match, with potential falling either way. In the end though, on paper, I think Vader gets a small edge here. With Zam down, Jango's only hope is hoping around the reach of Vader's saber, and he can't avoid the Force. DSDs land pretty well here, as well.

-Yoda and Clone Troopers

Like Palp, Yoda has trouble doing damage and without movement cards, bad rolls can mean the game for Yoda. Plus, with extra Chokes, Stormtrooper cards and a ATE you shouldn't bother with, Yoda's Force Lifts are canceled as soon as they're played.

-Han Solo and Chewbacca

Depending on the board and your luck avoiding the Bowcaster, Vader's chances are significant here. And let's face it, like Jango with the yellow deck, Stormtroopers and DSDs fair decently here.

I would say that's about it. All the other characters are just too much pop for the big guy to handle. A bad boba draw would land him in dire straights, but that usually doesn't happen. I also beat Dooku with Vader once, but since I don't remember some brilliant turn of events there, I'm thinking that too was based on luck.

"There's always a bigger fish."
--Qui-Gon Jinn