Recently I have become a big fan of Andrew W. Blackwood, whom Jay Adams calls "The greatest homiletition of the last century." Before you discount Blackwood because you have never heard of him, he was chair of Homiletics at Princeton for 17 years (early to mid 1900's). He wrote over 20 books on preaching including, Biographical Preaching for Today, Planning a Year’s Pulpit Work, Preaching In Time of Reconstruction, The Fine Art of Preaching, Pastoral Leadership, The Growing Minister, Doctrinal Preaching for Today, and his best work, in my judgment, The Preparation of Sermons. I would encourage all pastors, and especially those who believe preaching to be an art to read Jay Adams' "The Homiletical Innovations of Andrew W. Blackwood." Outstanding!
Things to wheat and chaff (not found in Lloyd-Jones or Spurgeon) are;
1. His passing remarks encouraging choirs.
2. Some use of progressive ideas such as a paid organist.
3. Endorcement of Barth as an example of a pulpit master (although himself renouncing Barth's theological method).
This man came from Scottish Covenanter & Seceder roots and knows what preaching is. He calls preaching an art rather than a science. I love this thought of Blackwood, "Homiletics is the science of which preaching is the art, of which a sermon is the product.' He insists that the greatest power the preacher can posses in doctrinal and biographical preaching is imagination. Something he contends the Puritans had in abundance, and something we seem to have lost.
I can't say enough good about LLoyd-Jones and Spurgeon, but if you wish to study further, read Blackwood.