I can support your first two choices, with my preferences in reverse. As for the rest, I would put your third choice as dead last. I view him as outright dangerous and untrustworthy on par with the Clintons, while the one you described as an adolescent merely retained the services of their footsoldiers in Little Rock, also nearly equally as untrustworthy. I cannot in good conscience vote for any except the first two in the general, and under no circumstances for the other two I just cited.
In fact, I think a Thompson-Romney ticket might actually be our strongest offering given the geographical balance as well as idealogical balance.
Those turned off by Fred's age and gruff style might be attracted to Mitt's smooth style and great hair. Those turned off by Mitt's smoothness might actually like Fred's down-to-earthness.
Bush I definitely was ready for prime-time after being Reagan's VP and quite possibly would have gone on to being a great president had he not been snookered into raising taxes. I see Romney as a similar type. Too liberal-- definitely. Persuadabale-- probably. Smart leadership and management skill-- good to excellent.