@ Allison McKenzie: I think the first nonwhite most Americans think about will be the Rev. Dr. Martin Luther King, Jr. I certainly admire him for many traits, his courage, dedication, and selflessness among them. That and his life itself. Many, if not most, social advocates today tend to use their faith as a prop for their agenda whereas Dr King chose his agenda from his faith and stood by the whole of it (including his nonviolence stance)
There are other people of color that are inspirational here in the US as well as around the world but it’s easier for me to think of groups rather than individuals. Such as the Tuskegee Airmen or the Buffalo Soldiers. The sort who never rose to any individual fame but just kept plugging along in their ordinary lives and stood by one another and their duty.