The best commentaries (it is difficult to prioritize these) on the WCF are A.A. Hodge, David Dickson (Truth's Victory Over Error), G.I. Williamson, Joey Pipa, and Robert Shaw's The Reformed Faith. If one wants a complete library on the WCF, one should also pick up Gordon Clark and R.C. Sproul (Truths We Confess). On the WLC, there are only three commentaries on it in existence: Thomas Ridgely, Johannes Vos, and Joseph Morecraft (Authentic Christianity). On the WSC, there are quite a few: Thomas Boston, Thomas Vincent, Alexander Whyte, G.I. Williamson, John Flavel