Non of those mentionned cuts it at all except Prandelli(though if forced to, I wouldnt mind taking a longshot on Advocaat despite his poor track record). We need to learn our lesson after Ranieri and not pick one half-assed and just settle, it must be a really quality one, topnotch and preferably proven (though gambling with someone like Gasperini MIGHT be ok, if you really believe in him, Lippi was quite green when we got him).
But in general, very little viable options out there, so its pointless to throw around names (Though if one wants to dream, I would kill for Wenger, it would be the only team signing a coach would excite me way more then any player signing).
But if you are going to bother, puleeezz have the decency not throw around retarded choices like the barely Serie B level Cosmi (ok if you mention the likes of Hiddink, Pellegrini, Laudrup etc). WTF? Ranieri is twice the coach he is, the thing with Ranieri is a VERY good coach...for a team outside the absolute top level, just below that, and he is accomplished and good catch. Many of those mentionned are inferior to him.