#1 The Hall of Pain
After being drafted to SmackDown in 2011, Mark Henry embarked on the most captivating run of his WWE career. Henry created the "Hall of Pain" - a fictional Hall in which he put his opponents in after (kayfabe) injuring them. His victims included the likes of Vladimir Kozlov, Great Khali and the Big Show. After inducting Sheamus into the Hall of Pain, Henry earned a World Championship shot against Randy Orton, in which he successfully became the fifth African American to win a world Heavyweight title.
Henry conquered Randy Orton and then moved on to a rivalry with the Big Show over the World Heavyweight Championship that consisted of many great moments such as breaking the ring at Vengeance 2011, as well as catapulting then Mr. Money In The Bank, Daniel Bryan to his first World Championship win.
Henry didn't have the longest World Title run, but without a doubt, his Hall of Pain storyline was an integral part of making SmackDown entertaining week after week at the time, as well as ensuring that both Big Show and Daniel Bryan gained higher status in WWE as a result of his feuds with them.