The Murder of Fred Hampton (1971) – live footage from the life of Fred Hampton in the Chicago Black Panthers, very dry content but super cool stuff to have on tape
Judas and the Black Messiah (2021) – dramatization of William O'Neale's time as an informant on the Chicago Black Panthers, as well as his eventual betrayal of Fred Hampton, very solid (what got me researching the Panthers more in the first place)
They're probably already on your list, but:
Sounds great!