MsMcDucket, thank you for that list. Some of the items mentioned were also mentioned on the website from the link I gave before. The expression "real McCoy" does not refer to Elijah McCoy. Frederick Jones did not invent the refrigerated truck. And Daniel Hale Williams was not the first to perform open heart surgery.
But that is not the point. Doubtless there have indeed been many blacks that have made signifigant contributions to our knowledge and technology, bad examples such as the ones mentioned notwithstanding. Probably some of on your list are valid. However that does not mean that the creative and intellectual potential of blacks as a group is equal to that of other races. Looking at IQ levels for example (which don't give the whole picture of what someone can achieve but it is good for demonstrating this point) the IQ in a population follows something like a normal distribution curve. Between population groups the mean of the curve may differ by a handful of IQ points, 5 or 10. This may sound insignifigant, and there is indeed considerable overlap between the populations, but at the extremes of the distribution there is much more of an effect. Shifting the curve towards lower IQ by a small amount results in greatly less people with high-level IQs, the very people who are likely to contribute towards progress, scientific and other, and many more people with moronic IQs, the people who are going to make the social system break down and contribute to general disorder and chaos. So although there may be a number of black geniuses, doesn't mean that a merging of the white and black gene pools wouldn't have a catastrophic effect for the nature of our society.
Not that I would say that IQ is the only issue. Generally it has been shown that East Asians have a higher IQ than whites. That doesn't mean that I would be in favour of miscegenation between the Chinese population and the European population, in order to increase IQ levels in Europe. My view is, once we have established that racial differences are real, then it becomes worth trying to preserve the races as they are. That way the diversity means that each race can contribute to humanity whatever its unique characteristics have to offer in the way of progress.