Objectively speaking, there is no such thing as "best winery". Even if one were to take the marks of all competent wine guides and select the best from the average, this would only be statistics. An important criterion is certainly an outstanding wine evaluation of as many of the winery's products as possible and also of several independent institutions over a long period of time. Relevant keywords are:
The wein.plus encyclopaedia is a comprehensive, well-researched reference work. Available anytime and anywhere, it has become an indispensable part of teaching, used by students and myself alike. Highly recommended!
Dominik Trick
Technischer Lehrer, staatl. geprüfter Sommelier, Hotelfachschule Heidelberg