The Marconi I was referring to claimed to have invented the radio and made himself very rich. Nikola Tesla actually invented the radio while he was working in his labs in Colorado Springs, Colorado, but like much of what Tesla invented he did not make any money from it. There were patent fights that went on for years, but in the end, Marconi did admit that he had stolen the technology from Tesla after he had already cashed in on the technology that he stole from Tesla. I take issue with Elon Musk stealing and using the name Tesla for an automobile company. Why didn't he name it Musk? 
Tesla was a good guy.
Marconi was the bad guy.