I don't think Flex should be on any of these lists.
Why?
Because to me, an "uncrowned Mr. Olympia" is someone that should have won an olympia contest, but did not.
And, it can be argued quite convincingly that Flex Wheeler did not deserve to win ANY of the Olympia contests he entered.
he had the POTENTIAL to win, but never showed up in great shape (even in 1993, his best Olympia appearance ever, he was soft from the back below the waist (no hams, glutes or calves). Personally, I though Shawn should have been higher than Flex in 93. Had Flex shown up in his AC condition, I think he could have won the whole thing. But, he choked. And that was the curse of his career: he never got it all together for the Olympia. He always seemed to peak for the AC.
Some of the others on this list (eg. Kevin (02), Shawn (94) and Labrada (90) are the TRUE uncrowned olympians because they should have won the olympia on a particular year, but were given second instead.