Database: Halfdan

Arguably the greatest son of the already-great Ragnar Lothbrok. Halfdan led the vast heathen army that sacked London, conquered York, and extorted every petty king from Exeter to Hadrian's Wall. If that doesn't buy you a round in Valhalla, what will? He had bested everyone, yet still he brooded and raged, unable to enjoy his ill-gotten riches.