#2 Randy Orton
Randy Orton and Seth Rollins share a storied past owing to their involvement in The Authority. After initial success, Triple H's blessing helped The Architect win the Money in the Bank contract and enter the main-event scenario while Orton got pushed back to pave the way for Rollins. Eventually, The Viper had his outburst and it led to his ouster from the faction.
The two then fought each other at WrestleMania 31, and at Extreme Rules in a Steel Cage match for the WWE Championship. Regardless of the winner, both the matches were appreciated by the fans and it left the WWE Universe longing for more battles between the two of them.
Corey Graves deleted his Tweet! More details HERE.
Since 2015, we have never seen them collide with one another and if Rollins is looking for a fight, I will, as a fan, prefer to see him take on the 13-time World Champion. Orton is someone who can get away from the clutches of Akam and Rezar and take the fight to Rollins directly, as is evident from his ongoing feud with AJ Styles and The O.C.
Having a feud with The Viper will help Rollins project himself as one of the top heels of the company.