Uther was the second heir to the throne after his brothers Constans and Aurelius, before his uncle Vortigern exiled him to Brittany with his brother and usurped the throne. In 468, his brother Aurelius took back the throne, before being poisoned in 480 AD. Uther has had a strong reign fighting the Saxons so far. Hee has no heirs, but he has an illegitimate son, Madoc.
King Uther’s stats are visible at the following link.