Here are some more picturebooks that I managed to read thanks to Overdrive. Most of them, as you will be able to rightly discern, consist of picturebook biographies.
E-Picturebook Overdrive Haul
Strange Fruit: Billie Holiday And The Power Of A Protest Song by Gary Golio and Charlotte Riley-Webb (Amazon),
Shoebox Sam by Mary Brigid Barrett and Frank Morrison (Amazon),