#2 Bray Wyatt
Bray Wyatt is undoubtedly one of the best workers in the business today and is loved by the wrestling fans. Too many major losses, especially against top guys like John Cena and Roman Reigns, have caused damage to his ascension to the top of the roster. His association with Matt Hardy also came to an end following Hardy's retirement, and Wyatt hasn't been seen on television since August.
What can be done:
The Eater of Worlds gimmick has become very repetitive in terms of promos and hence has failed to garner crowd reactions. A singles run as a babyface is long due for Wyatt. He is currently working live events as a face, with matches against Barin Corbin. Thus we could see the singles face run becoming a reality.
Wyatt could be introduced with a new gimmick, maybe something like "The Messiah", in which he is the Saviour of the Masses rather than than the Eater. A shift to SmackDown could do wonders for him where he could have feuds with Samoa Joe and Randy Orton before moving on to the title picture against Daniel Bryan. It would be fun to see Bryan vs Wyatt feud reignite, with the roles reversed this time around.