Inferred orbital periods and companion masses for the initial MS candidate sample of 19,664 stars with excess RV and astrometric scatter. The subset of promising high-mass candidates (M_CO > 3 M_⊙) is highlighted with white markers on the right, separated by the dashed vertical line. Stars that survive the quality cuts described in Appendix B and are not in the NSS catalogue yield a final cleaned sample of 279 MS+BH candidates. Also shown are the recovered parameters for the two known Gaia MS+NS binaries in the sample, for which our method recovers moderate to high companion masses and long orbital periods.