WE HAVE A WINNER ... anyone that scares/intimidates Kissinger has my vote :)
You do not want Rumsfeld. While he is extremely conservative on foreign policy, he is very much a moderate on domestics. Even when he was in congress, he was known for being right wing on foreign policy, and a moderate who is slight to the right on everything else.
Also to note, he does not believe in supply side economics, and probably wouldn't be the guy into cutting taxes, he's also supposed to be (according to Dick Cheney of all people) somewhat liberal on some social programs (don't know which ones).