Perhaps the Neanderthals; although "Ugly' were the "Brains" of the Human species ? Unfortunately they got wiped out by the Imbecile Cro-Magnons ! Ha !
Perhaps they were the brains. For 350 thousand years they inhabited central Europe stretching across much of the continent. Though they never in all this time left their cave life, noting their naturally evolved form and living with nature as the actual true state, still I see them as anything but ugly.
Following the time mentioned, they probably appeared rather striking in reality. The young females may have been very cute.
Don't trust the scientists who are Neanderthals themselves sometimes. Afterall, they insist humans evolved naturally though it hasn't been proven no matter the thrust of putting this to rest. It hasn't been proven.
It won't be. In fact, the more that is discovered concerning Neanderthal and others, the more obvious it becomes we had nothing to do with their natural evolution.
The Answer? That's also obvious.