Recently, Waitress, Band's Visit, and Once (this one was a surprise).
In general, I find the musicals based on smaller lesser known independent films translate best. Part of it is the theatrical quality of independent filmmakers, the general quality of the source material, and the fact that most independent films are not usually very familiar so there is a freshness to the story. And even better when the translators use the film as a basis but not a literal translation.
Of course then you have the big budget hits that meet expectation like The Producers, Lion King, 42nd Street. Proving quality does rise to the top.