One of the american GA magazines ran a feature on this about 10 years ago. They found 10 or so people with some extraordinary hours in their logbooks. The winner was a guy who started at 16 or so and flown in the war, the airlines and then continued on with a commercial licence into his eighties inspecting powerlines and instructing. He had 60K odd as I recall.
Second or third place was a female instructor who had instructed all her adult life and was also into her late 70s or early eighties. Instructing from her youth for 60 plus years at 900-1000 hrs a year.....