#4 Aleister Black

Aleister Black is undoubtedly one of the most talented performers to ever grace the squared circle. The former NXT Champion has impressed on the main roster, with the likes of Cesaro and Sami Zayn falling down to Black's offensive style of wrestling.
Even if he's booked like an unstoppable machine, the Dutch Destroyer is yet to have a proper feud on SmackDown Live.
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With many Superstars waiting for an opportunity backstage, Black taking the fight to the company's biggest star seems pretty promising on paper.
Both the Superstars could engage in slugfests and give us some quality-driven bouts. However, this is not the right time for the creative team to put Black as the main antagonist on SmackDown Live.
Since the company would be wanting to bring someone as unexpected as Black to the fray, losing to the Big Dog may not fair well for him, even if he's presented strongly.