#6 The British Bulldog
'Davey Boy' Smith joined WWE in 1985 as apart of the British Bulldogs tag team with the Dynamite Kid.
After leaving WWE for WCW in 1988, the Bulldog return to WWE in 1990. In the finest match of his career and one of the best ever, Davey defeated his brother-in-law Bret Hart for the WWE Intercontinental Championship at SummerSlam 1992 in London. The match helped elevate Bret up the card to main event status but not Davey. Instead, he was released shortly after and returned to WCW for a feud with World Champion Vader, but was unsuccessful.
He returned to WWE in 1994 and wrestled in the Tag Team, Intercontinental and European Championship ranks for most of his time back. He briefly challenged for the WWE Championship in 1999.
Sadly, 'Davey Boy' Smith died on 18 May 2002 after suffering FROM a heart attack at the age of 39.