The correct answer to this open question is the following.
I consider that the more successful approach to getting equal economic opportunities (Jobs, Pay, Housing, Education) for African Americans was Martin Luther King Jr. (MLK) approach, not the Black Panthers approach.
The reason why is this. As the leader of the Civil Rights movement in the South of the United States, Martin Luther King Jr. used a better approach to protest: non-violent actions and demonstrations that were accepted by other groups nationwide, including white people. The Black Panthers approach was different, they indeed used violent protests to demand their rights. Most people disagreed with its methods.