Mathew Henry – Commentary on the Whole Bible. This truly is my personal favorite and go to commentary. Henry died after completing the commentary through Acts. For a list of the contributors after that, see here.
Charles Spurgeon wrote of Henry’s Commentary and said, “First among the mighty for general usefulness we are bound to mention the man whose name is a household word, Matthew Henry. He is most pious and pithy, sound and sensible, suggestive and sober, terse and trustworthy. You will find him to be glittering with metaphors, rich in analogies, overflowing with illustrations, superabundant in reflections. He delights in apposition and alliteration; he is usually plain, quaint, and full of pith; he sees right through a text directly; apparently he is not critical, but he quietly gives the result of an accurate critical knowledge of the original fully up to the best critics of his time. He is not versed in the manners and customs of the East, for the Holy Land was not so accessible as in our day; but he is deeply spiritual, heavenly, and profitable; finding good matter in every text, and from all deducing most practical and judicious lessons...”
Other Commentators I recommend: John Trapp, John MacArthur, Charles Spurgeon, Jay Adams, Jamieson/Fausset/Brown, Mathew Poole, John Calvin
Other Bible Helps/Cross Refrences
Anonymous – The Commentary Wholly Biblical: an Exposition in the Very Words of Scripture, vols. 1 (Gen-Job), 2 (Ps-Mal), 3 (NT) n.d.
This book is a great help in letting Scripture interpret Scripture. Each volume is purely composed of related verses to the verse at hand. The best part of this volume is that they related verses are typed out below the main text as opposed to having to look up all the cross-references.
‘It is very handy to have explanatory passages thus presented to the eye. In general the work is excellently done; but ministers with scanty purses can make a Biblical exposition for themselves.’ – Spurgeon
Anonymous – The Bible Self Explained. This is the same as the above book, except all 3 volumes are contained in one volume. Moody Press published this version in the mid 1950s. Both this one volume edition and the three volume edition “The Commentary Wholly Biblical”, are extremely rare. If you find a copy, buy it. I selfishly own two of them and use one daily.
Torrey, R.A. – The Treasury of Scripture Knowledge first published approx. 1830
This is the best cross-reference, topical concordance, and ultra concise Scripture interpreting Scripture tool out there. Invaluable as a Bible-study tool. Torrey (1856-1928) was an American fundamentalist who greatly expanded and re-published this work.