Poch is the standout name but i doubt he'd do much with this squad.
The safest pair of hands would be
Moyes and it kills me to say that as I haven't forgiven him for the way he left but the man knows how to drag a poor team kicking and screaming up the league. Did it with us first time round and he's done it again with West Ham who were in the same position as us a couple of years ago when he returned.
Ultimately whoever comes in is working with the same constraints, with the same group of poor players. Nothing changes until the clowns at the top leave. They've lowered the standards at this once great club to a point where they simply can't get any lower.
If we somehow managed to bring in a Poch or Tuchel, like Carlo they'd be running for the exit within a season.