I'd accept Fonseca, Favre but wouldn't hold much hope, just the football would be entertaining. (dear lord how far we've fallen).
Potter, Rodgers I'd support them.
Valverde, Poch, Conte would be the impossible dream.
How low must Fonseca's self esteem be to even pick up the phone to us? Even if he did he'd surely get an earful from the missus.
FWIW I think we need someone who is experienced, ruthless and cold and will make the right decisions and not care about trying to keep the various cliques in the team happy. We need someone to offload the players that disrupting the team and try build what we can with what's left. That's the painful rebuild Poch eluded to. I'm also guessing he was talking about the family jewels - Kane.
We've had this problem since Poch. We had him, Mourinho, Mason, Nuno, and none have managed to sort it. The only gettable who fits that model is perhaps Bielsa.
Failing that, give us someone we can enjoy watching while we lose.