If you seriously don't realize or appreciate their contributions then I guess there is no need for me to point them out by making a list. Your blinders will have to be removed by time, hopefully while you can appreciate the fact that great American's exist in all nationalities and religions.
But since I must, I will keep my list short because adding other name's could only detract from this young man and others in his category of American. He is, in my view, considered among the greatest of American's, not because he has a purple heart or a bronze star, but because he gave his full measure and paid the ultimate price for a Nation that questions his patriotism, contribution and the contribution of his people...
http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GSln=Khan&GScid=49269&GRid=20854848
This man glad gave his all to a nation that says you can't be a "true" patriotic American because of your Religion. However, the real question was not how he felt about his country? That fact is indisputable. The question is how does the land where all men are created equal, feel about him?