I am not sure interesting and successful necessarily intersect.
I remember being in a circle of friends with a famous pop star. For a famous guy who was supposedly partying a lot, he hated going out. He hated to meet people. He worked really hard on his projects (an album, a tour, the vidoes etc).
He wasn't particularly interesting, or interested, in socializing with new people, though he spent a little time with his family, and his girlfriend.
Actually, you probably all know successful people. They just work a lot with a single minded focus. It is not the same as being interesting.
Perhaps the minimalist person would have completely finished books, papers, tools and so on, and maybe they would not be interesting to hang out with.