First off, there's no such thing as "highest evolved." Evolution isn't some magic ladder, it's merely a process of adaptation to the survival needs of a given environment. A species that's "highly evolved" to fit the needs of their particular environment would be a major evolutionary disadvantage if that environment changed substantially, and would need to evolve in a different direction or go extinct.
Second, it's utterly bizarre in the context of Star Trek to perceive humans as having any sort of evolutionary advantage over other humanoids. Humans are one of the weakest species in the Trek galaxy. A ton of other species are stronger than we are -- Vulcans, Klingons, Andorians, Jem'Hadar, Hirogen, even Kelpiens. A lot of other species have superior vision, hearing, and other senses, or possess senses humans lack such as telepathy, or have abilities humans lack such as telekinesis or shapeshifting. A lot of species are more intelligent, notably Vulcans.
It could be, considering that the Q seem to be one of the most ancient races in the galaxy. However, they're too ancient. In "The Q and the Gray," the Female Q said that Janeway was five billion years younger than she was. I suppose she could've been exaggerating, but if she was speaking accurately, then the Q already existed before the Progenitors.