"Axel Wenner-Gren (the founder of Electrolux)"

The name Axel Lennart Wenner-Gren (1881-1961) was synonymous with wealth in the 1930s. The Swedish entrepreneur was one of the world's richest men, and all because of the humble vacuum cleaner.

Wenner-Gren did not in fact found Electrolux.  He was employed by the lighting company, and after WW1 he saw the opportunity to adapt the vacuum from industrial to domestic use, making his fortune. Soon he owned the company. Not content with cleaners however, Wenner-Gren also dabbled in newspapers, banking and arms manufacture.

It was believed by some that Wenner-Gren was a friend of the Nazi Hermann Göring, although this was disputed. But the rumour, along with Wenner-Gren's friendship with the Duke of Windsor in the Bahamas, led to him being economically blacklisted. It didn't do the Duke's reputation any good either...