Please tell me you're joking. Bob is no where near 6'0. I settled this last year. I've seen him and spoken with him many times. He's 5'10. Wolfe is 5'11 or a little over. Singerman aint 6'2 based on that pic. Close to it though. Depends of if Wolfe is wearing shoes.
My friend is 5'11 and 1/2 and at the 2007 Olympia walked right past Chick who was wearing dress shoes and was a slight bit taller, so I thought Bob was 5'11. Dennis does noticeably taller than "tall" bodybuilders [around 5'10] so I thought 6'0 made sense. Aaron said he was 6'2 and he has long limbs and in videos appears around there.
I think these height estimates are close at the very least. Dennis claims 5'11 and I doubt he would purposely lie but he was taller than Special Ed as well.