Definitely, Bobby Mcdonald . Never seemed to loose the ball and, NOBODY got by himMcDonald, even given his reputedly shameful tactics in getting a move, is easily the best left back I have witnessed at the club.
Danny Thomas, as a couple of posters have mentioned earlier. You don't expect too much from your defenders, well maybe to have the ability to defend but he brought a bit of creativity to his play. Almost dare I say it, a footballing defender.