Is that species or cultures, though? Humans and Halkans resemble each other, but we don't know if these are two separate species or just two populations of humans. Humans and Platonians resemble each other to an equal measure, but there are key differences that might make them two distinct species. Humans and TOS Klingons look alike, too, but are definitely two separate species. And Zephram Cochrane of Alpha Centauri is explicitly human.
So, are Dopterians and Kobheerians two distinct species, or do some Kobheerians just live on a world called Dopteria (and some others on Talaria)?
But that's the point, there are ALOT of species that are indistinguishable from humans. Even if you eliminate all of those with subtle differences like the Trill or Bajorans, there are species that look exactly like humans but are clearly not from Earth. For instance Lazarus, Apollo, the Fabrini, people of Beta III, Eminiar (we never see anyone from Vendikar), Capella IV, Argelius II (if not for the Empathic thing I would have written this off as an independent former Terran colony), Ekos/Zeon, Omega IV, Sigma Draconis, Sigma Iotia, Scalos, Elas, Gideon, Sarpedion etc...and that's just in TOS.