It's difficult to definitively declare a single "best" liver transplant surgeon in the world, as expertise and reputation can vary depending on various factors such as individual skill, experience, research contributions, and patient outcomes. However, there are several highly renowned liver transplant surgeons globally who are widely recognized for their expertise in the field. Some of these include:

Dr. Thomas Starzl: Often referred to as the "father of modern transplantation," Dr. Starzl pioneered liver transplantation and made significant contributions to the field. Although he passed away in 2017, his legacy and contributions to transplant surgery remain highly esteemed.

Dr. Henri Bismuth: A French surgeon renowned for his contributions to liver surgery and transplantation, particularly in the development of the "Bismuth-Strasberg classification" for liver tumors and his work on living donor liver transplantation.

Dr. John Fung: A leading liver transplant surgeon who has made significant contributions to the field of transplantation, particularly in the areas of immunosuppression and living donor liver transplantation.

Dr. Ronald W. Busuttil: An American surgeon who has played a pivotal role in advancing liver transplantation, especially in the areas of surgical techniques, patient selection, and outcomes.

Dr. Chung-Mau Lo: A prominent liver transplant surgeon based in Hong Kong, known for his expertise in living donor liver transplantation and for leading innovative research in liver surgery.