21. Jackie Chan
Jackie Chan has a movie called Mr. Nice Guy in his filmography and that is perhaps the best description of the Hong Kong movie star who also made a name for himself in the States. He always carries that smile which is just so endearing and warm.
Jackie is also a very hard worker who has done incredible things for his movies. He is also always the first to acknowledge the people he works with, especially the people who do stunts (he does most of his own, btw) and who are often forgotten once the movies come out.
Jackie is also one of the leading celebrity philanthropists, helping people around the world, from China to U.S. He is especially dedicated to the cause of education, saying that his biggest regret was never going to college.