Generally there were individual movements in each movement, all of which varied in level of violence. I wouldn't say they were 'global' in that they were multinational - rather they represented global trends.

I would say the movements that worked as an example for all of the rest would be, from most peaceful to least, the Indian National Congress, because India was the largest colonized country, the Front de Liberation Nacional (FLN) in Algeria, for its huge role in creating discourse on decolonization (see Fanon, Sartre, etc.), and the Viet Minh for the extreme brutality of decolonization and its successful fight against colonialists.

Agree with clock. I'm thinking Cold War, Non-aligned movement, growth of anti-racism, pan-africanism, or founding of UN and subsequent statements on human rights. Not sure if these really answer the question. Also I can't recall one particular source to recommend on this topic. Carol Anderson wrote a book on the UN that may be helpful. I seem to recall Odd Arne Westad's The Global Cold War addressed decolonization quite well - might help you develop some ideas. Sorry for the terrible writing - I'm out and not on a real keyboard.