Bobby Kennedy for President, the Netflix 4-part documentary, does a pretty good job doing this, obviously wrt RFK. I really hadn’t known as much about his nasty work with McCarthy, his early views of the civil rights movement and its leaders. But RFK definitely evolved over time, to become the person many in society now celebrate.
Have to agree with you that it’s more useful and honest to acknowledge the full story. We all stand to benefit from seeing how people are able to undertake this very transformation, for our own sake, and that of our fellow planetary inhabitants.