Dr Roflstein

Dr Roflstein is the smartest known man on Earth, renowned scientist and Head of the R.O.F.L institute of technology. He has been the main antagonist in nearly every series he has appeared in due to his immense intellect and strength, he was also the dictator of earth during the events of My Future: Beyond though that is non canonical to the main Squadroverse.

Background
He survived the Black Mesa Incident and may have gained additional abilities due to experimenting with the DNA of Xen lifeforms, after he escaped the facility he went on to found the R.O.F.L institute with the remaining Black Mesa and Aperture Science teams.