Let's not try to even imagine, let alone list them all, but start with JFK, MLK, RFK, and Malcolm. No real ancient history there, but merely the tip of the iceberg.
Chaney, Goodman, and Schwerner, Fred Hampton, Mark Clark, and Bobby Hutton.
Sacco, Vanzetti and all who died in the MOVE house.
But these are all notorious cases and named individuals.
What about all of the labor leaders, labor organizers and striking laborers.