#3 Jeff Jarrett

Jeff Jarrett is a WCW legend and a 6-time WWE Intercontinental Champion. His last appearance in WWE was in 1999 and WCW in 2001.
Jarrett hasn't ever appeared in a WWE game. This year though, things may change and he may be featured in WWE 2K19.
Sting in WWE once again? More details HERE
Should anyone have said that a year before, it would have likely sounded impossible, considering the past issues in his relationship with WWE.
Regardless, Jarrett was inducted into the WWE Hall of Fame this year much like the Dudley Boyz--which marked his first appearance in WWE in 18 years. That, in turn, could be a sign of WWE potentially including Double-J in the 2K19 game.
There is a chance of JJ appearing in WWE 2K19 as a part of DLC. Should Jarrett be included in WWE 2K19, it will be his first-ever time being featured in a WWE game. The fans would most definitely love to see this one.