Einar Aas, an independent trader from Norway specializing in power futures. He made 8 figures a year for over a decade including 97 million in 2016 (all public record due to the fact that in Norway everyone's tax returns are public). He took a massive loss of hundreds of millions of dollars (one source says 252 million euros others say less, about 115 million dollars but I think they might be misinterpreting some information) on a spread trade involving Nordic and German power futures contracts in 2018. He's an analyst now, not trading anymore.
I think he was pretty amazing. Just one man doing it big, trading his own coin in his pajamas from his mansion surrounded by empty houses that he bought just to have more privacy. Too bad things worked out the way they did.
https://www.nytimes.com/2019/05/03/business/central-counterparties-financial-meltdown.html
lol NYT says the loss "shook the world's financial system" uh.... sure.