I haven't read much Hugo biography, but I think Les Miserables is the weaker masterpiece, due to his daughter's death. Hunchback has some of Hugo's long-windedness, but IMO, is better paced.
Les Miserables was nearly laying it on too thick, and I think it exhausted my capacity to ever reread it.
I know they didn't have grief counselors in those days, but Hugo verily needed one.