#4 Yokozuna (Age - 26)
A member of the legendary Anoa'i family, Yokozuna is easily considered to be one of wrestling's best big-men ever. For a man who was truly gigantic, he was able to move around the ring very well considering his colossal frame, meaning it was only a matter of time before he entered the main event picture.
In 1993, Yokozuna won Royal Rumble by eliminating Macho Man Randy Savage and became the first man to earn a main event title match at WrestleMania as a prize. He then then defeated Bret Hart at WrestleMania IX before dropping the belt immediately to Hulk Hogan after the match.
Undeterred, Yokozuna rallied back to win the title at King of the Ring that same year, in what was Hogan's final WWF appearance for nearly a year. Yokozuna did all this at the age of 26.
He went on to clinch two World Titles before he was 30 and was one of the leading Superstars at the time. However, once he lost the WWE Championship to Bret Hart at WrestleMania X, he slowly faded into the shadows.