As I have mentioned, there are a few fossils which have Homo-like affinities from 4.2 MYR ago. You seem to forget that. As I have pointed out some of this evidence goes back to at least 2 million years. Pygmys certainly don't look exactly like me. Aside from these examples, there is little evidence that any of the other visible differences among the world's people provide any advantage.
Nobody knows, for example, why orientals have epicanthic eye folds or flatter facial profiles.
The thin lips of Causasoids and most Mongoloigs have no known advantages over the Negroid's full lips. So I would say that there is no requirement, biblical or otherwise for someone to look like me to earn the title, human. W may very well have been able to interbreed with H. erectus. In such a case, he could be our representative. Since anatomically modern man appeared earlier than that, it must mean non-human humans.