Okay, now for a list of all these guys OFFICIAL heights and NOT their exagerated "billed heights". I'll start with the tallest going downward. This can all be verified on celebheights.com
Giant Gonzales - 7'6"-7'7"
Khali - 7'1"
Big Show - 7'0.5"-7'1" (in the 1990's) 6'11.5"-7'0" today
Andre The Giant - 6'11.5"-7'0.25" PEAK (6'10" DEATH)
Haystacks - 6'9" PEAK - 6'7" Death
Kevin Nash - 6'9.5"-6'10"
Undertaker - 6'7.5"-6'8" PEAK - 6'6"-6'6.5" TODAY
Sid - 6'7"
Big John Studd - 6'7"
Kane - 6'7"
Hulk Hogan - 6'6" PEAK (6'3" today)
Viscera - 6'6"
Akeem/One Man Gang - 6'6"