I have already put in my vote for the Devil Rays.
That said, I would not be surprised if any of the other 3 teams you mentioned took the 2nd wildcard.
As far as the top 4 teams go, I would be highly surprised if any of them missed the playoffs. IMO, the only real question is who will win the AL East and who will have to settle for the WC. The most susceptible to missing the playoffs would be the Yankees, but sadly, that won't happen.