#7 Sin Cara
Oddly, if you follow WWE's social media, Sin Cara still does a lot of work for WWE - even recently visiting Premier League team wolves to meat Raul Jimenez, who used Sin Cara's mask for a goal celebration.
If you've only started watching WWE in the past year or so, though, you're probably asking, "Who's Sin Cara?"
Sure, injury has blighted Sin Cara for the past two years, but he did make his return last year to feud with Andrade, only for a one-match blow-off before undergoing surgery again. In March 2019, he was cleared to return to in-ring action and returned at Super ShowDown in June, competing in the 51-man battle royal, but that's the last we've seen of the luchador to date.
Regardless, he is a great ambassador for WWE, but you can't help but feel like he's being wasted.