#1 The Rock

The Rock is without doubt the most famous pro-wrestler on the planet which makes his lack of a Hall of Fame induction baffling to say the least.
It seems unfathomable that the man born Dwayne Johnson will not be inducted one day, but there is no question that his induction is already long, long overdue.
Did you know a top WWE Superstar just wrestled outside the company? More details HERE
Rock has not been a full time wrestler since 2002 and has not wrestled a single match lasting longer than six seconds since 2013, when he lost the WWE Championship to John Cena in the main event of WrestleMania 29.
The Rock’s in-ring wrestling tenure was relatively short by Hall of Fame standards, with him only being a full-time superstar for six years; however, in that time, “The People’s Champion” won nine World Championships (7xWWE, 2xWCW/World), and also captured Intercontinental and Tag Team gold and won the 2000 Royal Rumble match.
The Rock headlined three consecutive WrestleMania's from 1999 to 2001 and returned in 2011 to headline both the 2012 and 2013 editions. The Rock’s comeback also encompassed a tenth World title reign in which he ended CM Punk’s modern day record 434-day run with the WWE Championship at the 2013 Royal Rumble.
Presumably, The Rock's A-list Hollywood career and busy film schedule is the barrier to induction. Perhaps a Hall of Fame berth has already been offered to the "Great One" and he has declined due to other commitments.
Regardless of the circumstances, that have prevented Rock's induction occurring before now, it is unquestionable that he is the most overdue Hall of Fame induction of them all.