Probably the best example would be modern South Africa and the end of Apartheid. This definitely was a (relatively) bloodless revolution, and it resulted in the enfranchisement and granting of increased economic and mobility rights to millions of black South Africans. The national elections in 1994 represented a culmination of decades of internal resistance and campaigning, as well as worldwide pressure on the previous regime. To this day democracy remains relatively strong (on African terms) in South Africa, and even though there have been bumps economic participation has widened and is now benefiting a much wider group of people.

A very interesting example is that of Bob Denard, a frenchman (wiki link: http://en.wikipedia.org/wiki/Bob_Denard) who managed to initiate four coups in the nation of Comoros, often on his own. The man was certainly good at overthrowing governments, although he was tried as a war criminal.