#1 AJ Styles

AJ Styles had made his debut in the year 2016, back when the pyro was active in WWE. In fact, the Creative used to have a blast effect during his entrance. You can view the video here.
This entrance gave a different identity to AJ Styles and the young members of the WWE Universe started mimicking him as well. But since WWE removed the pyro, Styles’ entrances are no longer the same. WWE has added a white-light effect to his entry, making the affair seem unexciting.
The Phenomenal One is truly one of the most prominent Superstars of the modern age. As he has said that he will not sign a fresh contract once his current deal expires, the WWE Creative should put as many efforts as they can to make his run special.
Perhaps, one step in that direction is the addition of pyro which should definitely be done next week. They need not try a new one but use the same old effect once again.
Apart from the names mentioned here, Rey Mysterio may get the fireworks back in his entrance. Brock Lesnar also could get his trademark entrance with the pyrotechnics soon.