One of the most gifted preachers of our times was Dr martyn Lloyd Jones. The following links are to some of this great series. The recordings was done in the fifties and sixties so the quality is not always so good yet can be followed and in most cases are well restored.
Especially relevant is his series on Spiritual Depression
A collection of 24 sermons that Martyn Lloyd-Jones preached in 1954 on a subject that few other preachers cover. This extremely helpful collection includes 10 sermons that are not in the book of the same title, which has become a Christian classic.
http://www.mljtrust.org/collections/spiritual-depression/
Preaching and Preachers
recordings of the 16 lectures that Martyn Lloyd-Jones gave to students at Westminster Theological Seminary in Philadelphia, in 1969. There are also 2 question and answer sessions that were held after the 16 lectures.
http://www.mljtrust.org/collections/preaching-and-preachers/
Romans
The famous series of Friday night lectures on the Letter to the Romans, split into 14 volumes to parallel the books, plus a small collection of 13 individual sermons preached at Westminster Chapel.
http://www.mljtrust.org/collections/book-of-romans/
Ephesians
MLJ’s major series of 232 sermons covering all 6 chapters of Paul’s Epistle to the Ephesians, plus a small collection of 5 other sermons preached at Westminster Chapel. The major series is a systematic exposition of the epistle that was preached on Sunday mornings between 1954 and 1962.
http://www.mljtrust.org/collections/book-of-ephesians/
John