I had to go with The Extreme Horseman.
Why? Well.... for one, I think they're an awesome tag team and have contributed more to the business than Swagger and Vader. I mean, Swagger's been in the spotlight as a professional wrestler for only a year, and Vader, well, I like Vader and enjoyed a lot of his work, but really... he was inconsistent and his prime didn't last very long.
Steve Corino and CW Anderson, on the other hand, have both been in the business for over a decade and have entertained me and thousands of other fans since their debut, every time they stepped through that curtain. They're two fantastic professional wrestlers, and The Extreme Horseman gimmick was one of the best, most creative the business has had this decade. It's just a shame they didn't get a bigger platform to showcase it on.
And kayfabe wise, Corino and Anderson are tough enough to take whatever Vader can dish, while also intelligent/experienced enough to single out Swagger, keep him from getting that tag and find a way to get a win over him.