Protecc

Protecc was an iron golem in Dan's Minecraft Hardcore lets play. He, along with Attacc (and later Smacc after Attacc's death), helped keep the villager vending machine safe and was the longest of the three Iron Golems to survive.

He was killed by hostile mobs (likely skeletons) in the 11th episode of the series ("We Lost Three Friends In Minecraft Hardcore..!")