History

David S. Reynolds's John Brown: Abolitionist has a few chapters on Brown's early life that will give you all you need there.

There's a recent biography of Toussaint Louverture, Black Spartacus, by Sudhir Hazareesingh, that does what it can to reconstruct Toussaint's early life.

Peniel Joseph's biography of Kwame Toure, Stokely: A Life, has barely anything about its subject post-1970, but has lots of detail on the leftist scene in NYC in the 1950s.

For Trotsky, he has about a hundred pages on his childhood in My Life, and the first volume of Deutscher's biography will also be useful.

It's been quite a while, but I remember appreciating Howard Zinn's "Growing Up Class Conscious" section of You Can't Stay Neutral on a Moving Train. Note that it's later in the book than you might expect.

Jonathan Spence's The Gate of Heavenly Peace is a history-through-group-biography of several revolutionary (and some non-revolutionary) Chinese figures, from pre-communists like Kang Youwei to Mao and beyond. Of particular interest might be the lives of Qu Qiubai and Ding Ling, both of whom Spence treats with affection.

It sounds like you might not want it, but there is an interesting section of Sartre's Search for a Method, a book where he tries to balance Marxism with existentialism, in which he defends the use of psychoanalysis as a way of explaining the ways in which people depart from the expectations and ideologies of their class. He takes Gustave Flaubert as his model and uses Flaubert's childhood to examine the author's loathing of the bourgeoisie he was born into. I'm not entirely sold, and I don't think much of Sartre's use of psychoanalysis in his own fiction, but it's an earnest grappling with the problem.

There's a recent novel about the young Ho Chi Minh. Haven't read it yet but it looks cool.