Caporegime
A good 1st check is can they give a post-match interview with any eloquence and charisma? If the answer is no (and there a lot like that) then they're hardly going to be able to enthuse and inspire players to perform for them are they? Equally there are some managers who can't give a decent interview too
I disagree with that. Ancelotti hardly gives off charisma in his interviews. He does look like a Mafia Boss however so that makes up for it.