'BABY FACE'
This movie, made before IMITATION OF LIFE, had a subplot of a friendship between two women, one white and one black.
And while Chico was "officially" Lily's maid, she was treated as an equal.
I remember one scene where Chico is about to go out on a date, and she's dressed to the nines--probably the first time in US cinema where a black woman looked so elegant.
For the issue of race relations, BABY FACE was a movie ahead of its time.