You cannot say that it is a fair competition when testosterone levels, which have been regulated for decades, are vastly, vastly different in Semenya and probably Wambui and maybe Niyonsaba, than in the rest of the field. Semenya looks like a man, has the build of a man, acts like a man, talks like a man, has the testosterone levels of a man, and easily, easily trounces the field--and would probably have walked off with the 400m title as well, maybe the 1500m too. But it would have been too risky, killing the golden goose, to win an unprecedented 400m/800m/1500m troika at the Olympics (Semenya did this as South African champs, I believe).
Going by time from the IAAF website (which tellingly had a picture of Melissa Bishop on the page for 800m lists: https://www.iaaf.org/disciplines/middlelong/800-metres), the real female rankings for 2016 look like Bishop, Jozhik, Sum. Sharp also had a bunch of fast times. Jozhik, being from Eastern Europe, has got to be suspicious, of course. The Eastern Bloc cheating continues as if it were the 1980s, as the Russian scandal and the Olympic positive tests prove.
I don't think that Letsrun should accede to the absurdity of Caster Semenya competing against women and rank Semenya first. Nor Niyonsaba and Wambui 2 and 3, though they were the best runners competing in the women's 800m by far.