Help please - Best cosmetic dentist for anterior bonding in the US?

There is no best bonding specialist in the US. And for any dentist to claim so is suspicious. A dentist is limited by her/his training, experience and the quality of materials and techniques. You can find the right mix in your state with a little investigating. Ask people you know or see who have nice teeth, check out reviews and pictures, visit a few dentists for consultation. Having work done by a practitioner with whom you can follow up and get regular care is a better way to a desirable result.