Alfred Krupp, German steel manufacturer, inventor, and the largest arms dealer of his age.

He was obsessed with building cannons and built the first successful breech loading cannon of cast steel. Common wisdom was that such cannons would explode and kill their operators. He kept building cannons even though nobody would buy them.

He was an extreme hypocondriac who also suffered from depression. He would not leave his bed for weeks or months at a time. He would weigh anyone who visited his house and kept over thirty years of records before he died. He loved the smell of horse dung and had his office built over the stables so he could always smell it.