Historically speaking the British monarchs were not very nice people, but for some reason their pompous misadventures in debauchery and murder are often overshadowed by the regal visage seen in classic paintings.
But portraits don't properly depict the darkness that surrounded British monarchs such as Henry VIII and King John, although you can often see the shadow of something sinister in their eyes.
With their knack for spreading that darkness around to their subjects it's not surprising people celebrated their deaths, but the worst offenders often got their just desserts in the end.
King Henry VIII (arguably) died of obesity, and his body had grown so large that a gigantic, lead-lined coffin had to be specially constructed for his burial...and then his body exploded when it was placed in the coffin.
King John got to die relatively intact, but his death was perhaps the most humiliating of them all- because he literally crapped himself to death due to dysentery. But at least he went out while eating a "surfeit of peaches"...