#2 Finn Balor
Much like Ali, Finn Balor is a fan favourite. One of the most over WWE Superstars currently, the leader of the Balor Club is the current Intercontinental Champion, the title which he won from Bobby Lashley.
Balor, like Reigns, was moved to SmackDown Live, where he will have a host of dream matches that he can be a part of.
Balor and Reigns for the Intercontinental title is not a great idea, as Reigns' focus has to be at the top prize on the blue brand, and not a mid-card title. As mentioned above, Balor has several dream matches that he could be involved in, including with the likes of Ali, Daniel Bryan, Shinsuke Nakamura, Jeff Hardy, to name a few.
Much like with Ali, if a feud between Reigns and Balor does happen, it will be Balor who will get all the cheers, which is not necessarily what WWE want.