I know what you might be thinking: Williams-Sonoma ( WSM 3.69% ) -- the parent company of home goods and furniture brands Pottery Barn, West Elm, and Williams-Sonoma -- doesn't seem like a traditional e-commerce company. But the omnichannel furniture retailer is also an underrated e-commerce stock with a booming online business. In fact, 66% of Williams-Sonoma's sales come from e-commerce, and it has grown e-commerce sales at an impressive 9.7% CAGR over the past 20 years.