Rare Few

The least well-adapted fail far more fequently than the well-adapted; hence the creativity of the unadjusted Rare Few, and the mediocrity of the well-adjusted Many.
There is an argument that Nietzsche himself was arguing against the popular conception of Darwinism, rather than Darwin himself.
If Nietzsche had read Darwin's The Descent of Man [I am assuming that he didn't], then I think he would have agreed with that book's notion of ual selection.

Of course there is an on-going symbiosis between man and his enviroment - the enviroment itself is a result of creativity. The enviroment also evolves in its own way, and so I object to the notion of a static enviromental 'given'.