3. Sheamus
Barrett is the King of WWE with a golden crown, so why not align him with the man holding the golden briefcase of WWE? Sheamus was the last King of the Ring to be crowned before Barrett and he’s in possession of the golden ticket of WWE.
Standard WWE’s style of booking for the MITB holder is to not be focused upon, and to lose matches on a regular basis to keep the shock value alive. WWE wants to be coy. In that case, why not put Sheamus in a tag team to protect him from losing?
Barrett needs a partner of equal physicality and a partner that won’t get in his way in order for him to build momentum. Sheamus is always physical, and is going to cash-in sooner rather than later. Being paired together is a great way for both men to play their roles and eventually move on to bigger things.