#4. Mustafa Ali
Mustafa Ali might look like just another Cruiserweight in WWE, but his promos and his ability to connect with a crowd is what separated him from everyone else. In fact, between how Ali spoke in a poetic and positive tone during his promos, to how exciting he was to watch in the ring, the man seemed destined for some form of greatness with WWE.
However, due to one reason or the other, Ali has almost always gotten lost in the shuffle. Of course, there are still rumblings that he could be revealed as SmackDown Mystery Hacker later on, but even that probably won't be enough for a viable shot at a major championship in the near future.
Ali has been on the sidelines for way too long and could easily be an asset to whatever roster he was put on. Hopefully, one day, WWE does realize this and uses him to his full potential.