HRT took care of my chest hair. Now there seems to be some fine vellus hair that is nearly invisible, and that is it. It slowed growth on my legs, face and arms, but seemed to have a dramatic effect on my chesthair. FWIW my HRT includes Bicalutamide, Dutasteride, and micronized progesterone in addition to estrogen, and I couldn't accurately say which one did away with the hair.
Also I used to have these really dark hairs around my nipples and those got finer and finer until they were no longer seen. I would like to point out though, I have never had much hair on my chest or my tummy (which also went away), as always YMMV.