From Schiller-Wine:

Every year, towards the end, Handelsblatt online and Vinum release a list of the 100 Top Winemakers in Germany, this year for the 26th time. This is a pretty good list of Germany’s Top 100 Wine Estates. Overall, I would say, right on the dot, although there are always wineries where you wonder why they are on the list and other where you wonder why they are not on the list. Handelsblatt is the German equivalant of the Financial Times and Vinum is a wine journal.

About 20 of the top 100 winemakers follow organic or biodynamic principles in the vineyard. Weingut Battenfeld Spanier and Weingut Kuehling Gillot in Rheinhessen, both owned and run by H.O. Spanier and are two of them.