#4 Goldust
Goldust might very well be one of the most underrated WWE Superstars in the last 20 years. The Bizarre One began his career during the late '80s yet is still wrestling on Raw on more than a semi-regular basis against the likes of Finn Balor and Bray Wyatt.
There is even an argument to be made that Goldie ushered in the Attitude Era. His risque antics predate the likes of Stone Cold and DX. However, that obviously came with a lot of stress and pressure.
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Goldust recently appeared on Edge and Christian's podcast and opened up about his addictions earlier in his career to alcohol and cocaine, among other things. Thankfully, the former Intercontinental Champion has bounced back from that and gone on to have an extremely long career.