History and A&E are far and away the best basic cable channels for producers to work with, according to a first-of-its-kind survey of independent reality TV producers. By contrast, says the survey, BET and WE tv are the worst. The survey, sponsored by the Non-Fiction Producers Association, polled members and non-members alike to determine the rankings of 23 cable outlets in six major areas of concern to producers: executive creativity and dedication to the creative…