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More specific and etymologically correct than sentient.Still less common than that term, but has been used by multiple writers..
But Aliens with Forehead Ridges have much more than a general similarity to Earth Humans.
They have the same secondary sex traits - as species-specific as you can get.
Only their males have much facial hair, and their females often have bodacious figures. This leads to some speculation that they may be of Earth Human descent.
Except for the Energy Beings, most seem to be hydrocarbon life forms, but methane breathers who thrive at -200 C will sometimes turn up.
What they all have in common is that they are Really Alien.