Benitez? Are you guys kidding me? That guy is a joke.
Out of all the names so far the only one that has me anywhere near interested would be O'Neill. He's proven to be a very capable manager over the years. I think you have to look at who would make the team worse, before better. Benitez has the potentially to royally fuck up the team for years to come.

To me Ancelotti is just a "yes man" so I don't think he'd be a safe pair of hands, he's used to his bosses calling the shots and I think we'd all agree that we're not massive fans of the board.