Jeff Osher may be the most consistently successful hedge fund manager investors have never heard of. Since launching a decade ago, Osher’s Harvest fund has averaged yearly double-digit gains, with relatively low volatility, and a worst drawdown of just 10 percent. Besides prescient stock calls both long and short, his performance has been abetted by capping assets. Osher closed his fund more than 7 years ago, and regularly returns profits to investors.