Bonaventure, Commentary on Ecclesiastes (Works, vol. 7) -- A solid biblical exegesis of Ecclesiastes. He does use the Apocrypha, but his biblical theology is sufficient to overcome such deficiencies. Augustinian with minor modifications using Aristotle’s natural philosophy.
Charles Bridges, Ecclesiastes (Geneva Commentary) -- Helpful. Biblical and pastoral.
Duane A. Garrett, Proverbs, Ecclesiastes, Song of Solomon (NAC) -- More balanced than his Proverbs and generally edifying.
John Gill, Ecclesiastes, in Exposition of the Old and New Testaments, vol. 4 -- Solid biblical exegesis informed by ancient and medieval Jewish sources.
Martin Luther, Ecclesiastes, Song of Solomon, Last Words of David (Luther’s Works, vol. 15) -- Very helpful mediation on Ecclesiastes. (Luther at one point appears to defend soul sleep.)
Roland Murphy, Ecclesiastes (WBC) -- Highly technical. I did not end up using it sufficiently to comment on its technical value. Extremely low view of Scripture: “The king fiction, which it is generally agreed does not extend beyond chap. 2...” (12).