Any personality type can be good at sales.
Different types of sales require different types of sales people. If your sales deal with a technical or sophisticated product, you may need a more relaxed, analytical type of salesperson. The C or D-type personality works well here. If you need a hard sell type salesperson, a good cold caller and closer, an A or B-type personality would be better suited. The A-type is strong and will desire a challenge with good compensation and the freedom to accomplish goals.