The one person you've not mentioned is Benetiz. China isn't working out for him and his season ends very soon if it hasn't ended already. Given all the possible options and reasons he seems a very good candidate to take on an interim basis at least until the end of the season.
Whatever we do I don't want us to lose Freddie.
Absolute outsider who could turn us into a defensive unit and make everyone hate us - Diego Simeone. He's done wonders with Athletico, time to see if he can do it in the EPL and challenge the firepower of an establishing top 2.