#4 Brock Lesnar - the youngest WWE Champion
Brock Lesnar is perhaps the greatest brawler ever in the WWE. He conquered the undefeated streak of the Undertaker at WrestleMania. Throughout his career, he has annihilated and decimated his opponents like nothing.
However, Lesnar established a unique record in the WWE. He won the WWE Championship at the SummerSlam PPV in 2002. Lesnar was 25 years of age when he obtained this unique feat. Thus, Brock Lesnar became the youngest WWE Champion ever. He held the title for 84 days, before losing it to the Big Show.
Though there have been several wrestlers from across the world who held the WWE title, none could conquer this record of Brock Lesnar. At present, the record seems imperishable as there are no worthy young wrestlers who seem able to break this record.