Hands down I would have to say Mohandas Gandhi. You could say MLK but did MLK not look up to Gandhi and did MLK not follow the path of Gandhi?
Gandhi followed the right path in the Indian independence movement, that path was non-violence. Gandhi was a great political leader. He used non violence to help aid the corrupted minds of the British with there racist thoughts toward Indians.
Gandhi lead many different marches, rallies, and told many speeches to his followers. One of the more important marches would be the Salt March. Gandhi and many of his followers marched all the way from Ahmedabad to Dandi which was around 250 miles just to make his own salt in protest to the new salt taxes.
Gandhi was the main leader in the Quit India movement caused great entropy in India. There was a plethora of arrests going into the hundreds of thousands. Gandhi stayed strong behind non violence and was thrown into jail for 2 years. After Gandhi was released ( due to health issues ), and after Quit India had run its course, he called off the struggle as the British had made it clear that a transfer of power was approaching finalization.
Gandhi was a great man who burned his life into the ground for the people of India and he rose as a phoenix out of the ashes to a free India. W/O Gandhi's help India would not have been freed from Britain's control which is why I believe Gandhi was and in spirit still is the greatest civil rights leader.