Actress Lillian Randolph was black and is featured in a memorable scene. Her characters name was Annie I think
See the photos here:
https://www.google.com/search?q=lillian+randolph+wonderful+life&prmd=ivsn&source=lnms&tbm=isch&sa=X&ved=2ahUKEwir5IHf3-P7AhW7IjQIHZBYBckQ_AUoAXoECAIQAQ&biw=375&bih=537&dpr=2#imgrc=t0SYPzwga5x5xM
For 1946 she had a lot of screen time and some of the funniest lines in the movie.