If they can’t actually win then they aren’t superior. Losers can’t make any changes. Losing to 0bama will just give him 4 more unfettered years of fundamentally transforming this country from a constitutional republic to a communist hellhole.
The other candidates bring a lot to the race and discussion but in this critical election, electability is one of the major factors we have to look at.
Personally I think she'd do a lot better in swing states than a guy who looks and sounds like a clone of GWB.
If I was ranking Rick Perry SOLELY on electablity (rather than overall ablities), he'd end up alot lower on that list. Perry's vote totals are pretty mediocre considering he has the fortune to run a super safe Republican state. George W. Bush was MUCH more popular in Texas, and he only got 271 electoral votes nationally. The only reason Perry keeps "winning" in Texas is he's lucky enough to have token opposition that's even worse. If he had to run for Governor of a state like Michigan or Wisconsin against a well-funded Democrat, I'm pretty sure he would have gotten crushed.
I suppose Cain and Gingrinch might be weaker when it comes to the "electablity" factor, but that's about it.