John Murray’s work is that of excellence. He studied at Princeton Seminary under J. Greshem Machen and then went to teach at the newly formed Westminster Seminary after Princeton fell to liberalism. Recordings of Murray are rare, and usually of inferior quality. There’s excellent teaching in these recordings if you can struggle through the bad sound quality.
Murray penned one of the best books I’ve ever read on the atonement, ‘Redemption Accomplished and Applied.’ He has also authored an excellent commentary on ‘The Epistle to the Romans’.