I believe average TC for Okinawans used to be, or is, around 127. You could do worse than have the TC of an Okinawan, at least those that ate a traditional diet. I'm sure the spread of fast-food is having its effect there as well now.
Of course then you have studies like this http://healthfinder.gov/news/newsstory.aspx?docid=663079
which purport to show a link between low cholesterol and cancer. The thing I don't get about these studies is why this supposed connection doesn't result in high cancer rates for places like Okinawa. They should be dropping like flies if this connection were real. Maybe it's because these studies only look at people who eat a Western diet.