I still think that Trump could kill multiple birds with one stone by picking Jim Webb. The guy has military and political experience, has flirted with and abandoned both parties over the years, and as far as I know has no terrible enemies...except probably now the Clintons after saying several months ago that he would never vote for Hillary but does not know enough about Trump to say one way or another.
Webb also seems like a guy with fairly strong principles. If TPTB bumped Trump to install him, he (unlike Johnson) may be seriously displeased and make 'them' pay. If I were Trump, all candidates who were discernibly more palatable to TPTB/globalists than myself would fail to make the first cut.