Sleepers? Pear.
Nobody talks about pear, and I think it's the most generally successful fruit flavor - cherry is almost always yukky, citrus is hard to get right and the berries are so often candy/chemicalish (though I do have a stock of really good fruit flavors, found after long searching). Copper Creek has a terrific, fresh-fruit tasting, juicy refreshing straight up pear. Just "pear" sounds boring. It's not. But who buys 'pear' when you can get macadamia chocolate raspberry coconut mocha ice cream crumble with brandy sauce?
A golden sleeper.