#1 Should be - Shinsuke Nakamura

Shinsuke Nakamura recently lost the United States Championship, and with the WWE doing away with the rematch clause, expect the Artist to move on to feud with a newer opponent. Instead of inserting him in yet another singles feud, the creative team could freshen up his character by having him team up with Mandy Rose to battle Jimmy Uso and Naomi.
The King of String Style has poor mic skills, and if this partnership with Rose works well, the WWE can also use Mandy as his mouthpiece in the future. Given that Nakamura would be directionless on SD Live, this feud would at least guarantee us Nakamura on TV every week.
Mandy Rose and Shinsuke Nakamura can make a formidable team in the future if given the necessary TV time and opportunities.