One with those traits won. How many people since 1900 had those traits and didn't win? I'm guessing a whole lot more than one.
Those four traits don't necessarily make a Ronald Reagan. Unlike the others you have mentioned, Reagan had an incredibly likable personality which made it hard for even his enemies to personally dislike him and which made a lot of people who would have otherwise voted against him, vote for him. Reagan was a popular governor of a giant state which could provide a large percentage of the necessary electoral votes for victory. Reagan was the undisputed leader of the conservative movement. The dynamics of 1980 are a lot different than the dynamics of 2012 which means that those traits wouldn't guarantee a victory (although personally, I could easily vote for both Palin and Kempthorne).
Making points 2 and 4 fit Mitt Romney is a real stretch. I know very few conservatives who would claim him. Michigan and Massachusetts (his two strongest claims to a home state) are hardly western states.
The word “conservative” is relative. Romney is more conservative than Sen. McCain, Sen. Kirk, and ex-Mayor Guiliani. A March survey said that 68% of conservatives think that he’s conservative. I don’t support him. I’m only quoting other conservatives.