For nostalgia it would have to be any one of Brad MacKay, Jimmy Lowes, Bernard Dwyer, Robbie and Henry, Big Les, Graeme Bradley, Paul Medley, Elley Hanley, Karl Fairbank, Mike Forshaw sorry am I waffling now
.
However the OPs question was if you could bring back one player to improve the current squad who would it be so the answer is definately..................................
Paul Newlove