Horlak

Horlak was the leader of a tribe of Silurian scholars whom were afflicted with Raldoma Syndrome, a virus which, though harmless to his own subspecies, was deadly to the vast majority of Silurians. "Centuries" prior to 1886, the Sixth Doctor helped Horlak and his tribe quarantine themselves on an island in the Pacific Ocean. (COMIC: The Lost Dimensions)

Behind the scenes
The appearance of Horlak was derived from an unused "three eyed" design which was sculpted as a potential redesign for the Silurians to be introduced in TV: The Hungry Earth/Cold Blood but was ultimately passed over in favor of a two-eyed Silurian with a more human-shaped face.