Answer : There is no one "best" interior designer. However, some of the most prominent and well-respected interior designers include Kelly Wearstler, Miles Redd, and Jonathan Adler. Each designer has his or her own unique style and approach to interior design, so it's important to find one whose aesthetic aligns with your own.
Interior design is a highly personal endeavor, so it's important to trust your gut instinct when selecting a designer. Do some research online to see examples of their work, and schedule consultations with a few different designers until you find one you connect with.