Rudy is light years better than Romney, Newt, McCain or Huckabee but he is not in my top 5. His chickening out repeatedly for running for the NY Senate is also an issue.
I would rate all four of them well to the right of Rudy. None are gun-grabbing, pro-gay rights, abortion-loving "Catholics", although in Romney's case he used to be. Rudy was the most liberal Republican seeking the 2008 presidential nomination, and probably will be again.