Bolton defended himself recently from the ‘neocon’ charge by suggesting that President Trump would be better served by have a range of opinion from foreign policy advisors.
Bolton knows the State Dept. hierarchy and is well suited to change it...he also doesn’t present himself as a political rival to Trump like Romney would or Gen. Petraius might.
I’d be inclined to go with Ambassador Bolton over the other three names, although I’d like to hear more about the chairman of Exxon Mobil.
That is a valid point, and that is why I wouldn't discount the possibility of having Bolton serve in some advisory capacity or consulting role. He just has no business in the Secretary of State post, in my humble opinion.