The latest version (10.4.2) has a new feature that allows one to search the standard database for compositions with large matrix corrections.
From the Options | Find menu this dialog is available:
Based on the standards found based on the element and wt.% range, this standard list can be further filtered for elements with large matrix effects using these new controls as seen here:
Of course one can change the conditions and or analytical x-ray lines as necessary. The output is as seen here for standards in the Find list, containing elements with a large fluorescence matrix correction under the current conditions:
FindStandardsFilter: Starting standard filter operation...
FindStandardsFilter: large fluorescence correction for NIST SRM C2402 (Hastelloy C) (651), fe ka (7.3 wt.%), = 0.9176308
FindStandardsFilter: large fluorescence correction for Chromite USNM 117075 (455), ti ka (0.072 wt.%), = 0.9484967
FindStandardsFilter: large fluorescence correction for Chromite USNM 117075 (#455) (856), ti ka (0.072 wt.%), = 0.9485086
FindStandardsFilter: large fluorescence correction for Bornite U.C. #827 (709), fe ka (11.15 wt.%), = 0.9287004
FindStandardsFilter: Standard filter operation complete!