Busby. He built the best football team on the planet with a transfer budget of almost zero. And then, after the Munich disaster, he did the same thing all over again. I think I am right in saying that the European Cup winning side in 1968 were all products of the youth system that Busby had set up, apart from Denis Law who they signed from Huddersfield?
And Clough and Shankley must be in with a shout. Liverpool were pretty much a nowhere club until Shanks got to grips with them, and Cloughie’s achievements were at provincial and unfashionable teams rather than ones from the big conurbations.
I reckon Sir Matt gets the nod, though, IMHO.