I'm looking for examples of people who made some important contributions to the field of statistics, yet their original training was not in statistics and they may have learned it 'on the job', while statistics was an established field (which means I'm interested in people from the 20th and 21st centuries). I'm interested in details on how they finally ended up studying statistics.
If it's necessary to give a strict definition of 'formal training', let's say I mean people who did not pursue a higher education degree in statistics, but my underlying motivation for the question is learning more about outsiders in the field, so I don't mind possible deviations from this definition.
I asked the same question on stats.stackexchange.com, and got interesting answers and comments, but unfortunately it has been closed as apparently they don't accept questions with several possible answers. I thought I could ask it here instead to get further answers, as there are questions here that are somehow similar (What are some famous mathematicians that disappeared?, Who were some mathematicians who have had a musical background?, etc.)
Thanks!