Ambrose and Bryan
Personally not so sold on the chemistry of Bryan and Ambrose. Their Smackdown match was okay. But their old outings in DGUSA was horrible so I have a bad taste in my mouth when they wrestle.
Ambrose does seem to have some good chemistry with Kofi though. All their matches leading up to Ambrose winning the belt were enjoyable. Ambrose's style seems suited to take down high flyers.