Wm Johnson. Do you know him? Well Great Britain might not have won the French and Indian War without him--which means we might all be speaking French now. He was celebrated as a great hero in Europe and knighted by the king. What happened in America? Well, Johnson was married (happily) to a Native American woman who was terrific herself. They controlled the fur trade and became very rich. You'll find him in "From Colonies to Country." Mostly he's been written out of our history because he broke the mores of his time. He judged people by what they were, not by their skin color or ethnicity.
Then there is Robert Carter III. A contemporary of TJ and GW he had more slaves than the two of them combined. He freed them all, for all the right reasons. That action got him dropped from our history. But you can read about him in "The New Nation," and also in the ebook, "Free To Believe, Or Not."