#4 Aleister Black
Aleister Black has been compared to The Undertaker by many in the past, someone who was dominated by Brock Lesnar on many occasions. Black, although a great athlete and talker, isn't anywhere close to Lesnar's level when it comes to physical attributes.
But size hasn't stopped guys like Daniel Bryan and Finn Balor to have incredible matches with Brock Lesnar, and same goes for Black. Looking at how well Aleister Black can perform in the ring, it's almost a given that a Black vs. Brock Lesnar match could be one for the ages. This is another Lesnar match that never happened and would have been a sight to behold.
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#3 The Fiend
Fans might remember that back in 2016, Bray Wyatt had a short-lived feud with Brock Lesnar on the road to WrestleMania 32. Lesnar defeated Wyatt and Luke Harper in two Handicap matches at a WWE live event and the Roadblock event. Harper suffered the brunt of Lesnar's might on both occasions, and we never got to see The Beast take on Wyatt.
The Fiend and Brock Lesnar are two of the most dangerous entities in recent memory
Brock Lesnar vs. Bray Wyatt's alter-ego, The Fiend, is a WrestleMania-worthy match, that could have become a reality had WWE wanted it. Lesnar and The Fiend were both members of the WWE roster not a long time ago, but they went on to face different opponents at WrestleMania 36.