None of these three were my personal preferred options. Angelo makes me nervous, and Cohen is too tied to the old regime for my taste. Khan is more financial whiz than scouting guy, much like Tanny.
Of the three, I probably could accept Khan as a smart guy coming from a very well run team, if he brings a strong scouting type with him to reshape that side of the operation. Khan is highly regarded around the league as a smart, rising talent - hopefully smart enough to bring good people with complementary strengths along with him.