If he's available, I'd take Warnock as a temporary solution until the end of the season. With the transfer embargo he can't waste any money on dross signings.

He took over Rotherham when they were 2 points inside the relegation zone, they finished 9 points outside of it.

He took over us when we were 23rd and we finished 12th.

He took over Boro when they were 21st and outside of the relegation zone by 2 goals, they finished 17th and 5 points off the drop.

With our budget and in our situation I can't come up with any other names who I think would be better. Warnock has a proven track record of keeping teams up and at Boro and Rotherham he joined both clubs after the January transfer window, so he did it more or less with the squads he inherited.