I love Harper and Ambrose, but Ambrose is destined for bigger things I'm afraid. It might work in the short term, but I hate it when teams are thrown together for no apparent reason, and then get split up, again for no apparent reason.
Besides these two have always been at odds with each other. When Harper was with the Wyatt, and Ambrose the Shield they had some stellar matches together. But they have always been on different sides of the fence.
Rowan would be a much better teammate for Harper really, and I have no idea why to this day they weren't left together. They were legitimate contenders for the tag titles.
The only similarity is that they wear matching outfits, Harper's is admittedly dirtier, but that's where it ends for me.