#5 Jeff Hardy
The younger Hardy brother has developed quite the resume in the professional wrestling industry as he is a highly decorated wrestler in the industry.
Jeff Hardy, like Kane, is a Grand Slam Champion as per the older format but needs one more title as per the current format.
Jeff Hardy's Championship stats in the WWE:
Championships Won:
1) World Heavyweight Championship (2 times)
2) WCW Tag Team Championship (1 time)
3) WWE Championship (1 time)
4) WWE European Championship (1 time)
5) WWE Raw Tag Team Championship (1 time)
6) WWF/WWE Hardcore Championship (3 times)
7) WWF/WWE Intercontinental Championship (4 times)
8) WWF Light Heavyweight Championship (1 time)
9) WWF/World Tag Team Championship (6 times)
Championship required for a Grand Slam:
1) The United States Championship
Jeff Hardy is now out of action due to an injury but he did make a cameo in the Ultimate Deletion match between his brother Matt and Bray Wyatt on this past week's episode of Raw.
This does hint that Jeff Hardy will return in his Brother Nero gimmick alongside his brother, as we draw closer to WrestleMania 34.