Standard Chartered (STAN.L) said former JPMorgan (JPM.N) investment bank boss Bill Winters will take over as chief executive in June to replace Peter Sands, after investors demanded change at the helm following two years of problems. Asia-focused bank Standard Chartered said on Thursday Chairman John Peace will also leave next year, and named other changes to its board in a massive overhaul in management following problems ranging from a U.S. fine for breaking sanctions to a jump in losses from commodities loans.