#3 Kurt Angle
He is a former world champion and the current Raw General Manager, and a feud against the near seven-foot monster would do nothing but help Strowman. Why would Angle and Strowman feud with one another? Strowman's vicious powerslam on Angle through a table is an easy motivator. Maybe as the storyline builds, Angle would be out for retribution when his son Jason Jordan is hurt by a rampaging Strowman at some point?
If such a story twist was brought in, then much like the aforementioned Balor and Joe, Angle could sell Strowman's offence, but in addition, he would help tell the story of an angry father looking to exact revenge. How much does Angle care for Jason Jordan? Braun Strowman may just find that out.