Ally MacLeod?
We were supposedly the big fish in the league and MacLeod had money to spend. He did sign some good players for that level but failed to get the setup right and promotion. He boasted when he took over that we would be challenging for first division title within 2 seasons. It took Davie Hay to mould the players into a winning, entertaining team.. (And Jock Wallace to reverse it.)
My biggest gripe against MacLeod was that he played Willie Pettigrew out of position and May have been part of the reason that Willie left for Dundee United. (NOTE Only my opinion) Think MacLeod’s personality required himself to be the ‘big noise’ (and nose) at a club.