#3 Jeff Hardy

Jeff Hardy's career can not last much longer!
Think about it! Matt Hardy has already retired from the company a few months ago and there hasn't been a lot for Jeff Hardy to do since then.
WWE fired her, but she started earning more than ever - Check out!
Of course, he did compete at Survivor Series on The men's team and fought for The United States title, but he has essentially become filler as of late.
That's not to say he isn't entertaining filler and that his matches have become boring or anything, it just means that there isn't much the company can do with him anymore.
He's probably too old and injury prone to put him in a big-time spot for the title, which pretty much relegates him to mid-card feuds and putting over younger superstars.
Again, none of this is a bad thing and this isn't to try to paint Hardy's career as lacklustre, it's just that there's nothing left to do!
In the end, the options are essentially limited for Hardy at this point in his career and that's exactly why WWE should future endeavour him sometime in the near future.