Someone with a solution selling strength and the ability to build rapport, build trust in relationships. Solution selling is essentially the ability to conduct a needs assessment of the customer's problem, to then identify in essence the possible solutions that will help solve their problem. But a great sales person will then not only identify the customers needs, but create an understanding of their wants, and upsell/cross sell multiple solutions and or products.

An exceptional sales person will build trust in their relationships to the extent that their customers become "sneezers" as Seth Godin calls them. This is when the customers spruik the brand / product to their network. So, an exceptional sales person delivers the beyond the customer need, to essentially create a customer experience.