I don't know who is the most conservative of McCain, Romney, Huckabee, or Giuliani. What I do know is Romney is NOT owned by Soros, and McCain is and has been for a long, long time. If at election time, the choice is between Hillary and McCain, then there is NO choice as both are owned and operated by Soros.
Thompson is my first pick. He's a strong conservative. Unfortunatly he was sold down the river by the New MSM.
Huckabee is my second. He's been pigeon holed into looking like a one issue candidate. That's partially his fault. Either way, I don't think he can recover from it.
Romney is a liberal or communist, depending on which year you look at.
Giuliani is a cross-dressing freak!
That leaves McCain vs Romney. While I don't agree with all his positions, I'd take him over Romney. Despite the constant hammering by the New MSM, he has still managed to pull off some victories. He's been in public office since 82. Everything he's ever done is out in the open. Like him or not, there will be no surprises.