#2 AJ Styles
AJ Styles is arguably the most impressive wrestler on the WWE roster right now. He is "The Man" because he holds the prestigious WWE Championship title and is recognized by WWE as the first titleholder crowned outside of North America. Both PWI and the Wrestling Observer Newsletter voted him "Wrestler of the Year" for the year 2016.
Rey has expressed his desire to step back inside the ring for WWE following his successful cameo at Royal Rumble 2018, where he looked to be in great shape. He has recently gone on record saying he would like to have a match with Styles. A match between the two wrestling icons would be an exciting contest and a dream match for the WWE universe.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
This contest would most likely happen in the next big event after WrestleMania. The WWE should indeed sign Mysterio and set up this potential match of the year, and a contest for the ages.