Definitely Vick. First he does his whole dog fighting thing, then he goes & becomes a HSUS poster boy after he serves his time. I probably wouldn't have as big of an issue with him after he served his time if he hadn't gone & associated himself with HSUS, but I really hate HSUS that much due to their anti-pet efforts that have already cost millions of animals their lives. In short, Vick really screwed the pooch on picking his new allies.
As for some of these other supposed "criminals," there's a big difference between paying a settlement to shut someone up vs. a guilty conviction from a criminal trial. It's often cheaper & easier to just pay off the accusers in these situations even if the person being accused is innocent as the court battles tend to make things worse regardless of the truth.
Now if you want an example of a supposed "criminal" that almost certainly is guilty of more than they were charged with, then take a look at Ray Lewis. It's tough to not dispute those settlements he paid out to the two victims' families as an admission of guilt after his two companions at the time were acquitted. Lewis was just charged with obstruction of justice thanks to a plea deal, and the white suit he was wearing that night has never been found. If his companions hadn't been acquitted, then I wouldn't raise the issue, but it's pretty suspicious that all three of them got little more than a slap on the wrist while two families lost their loved ones. I would be very suspicious of him not just obstructing justice rather he probably played a bigger part in those murders & maybe even killed one or both of the victims.
I don't really have anything against the others. I don't really see why people hate Tebow & some of the others that much, though; I'm more concerned with that these guys do off the field rather than on the field when it comes to which one I dislike the most.