Brian Boru Pin
The story of Brian Boru is featured in this podcast series https://irishhistorypodcast.ie/category/podcast/the-high-kings-vikings/. Brian Boru emerged as an unlikley high king amid the chaos of the 10th century. Born to a minor family in North Munster his life story is remarkable as he first succeded to kingshipo within his own family, then Munster and eventually dominating the island in 1011.
He was killed at the battle of Clontarf in 1014