Question: What German doctor was also friends with Schack Carl Rantzau?

Context paragraphs:
Bernd Pansold: Bernd Pansold (born 3 April 1942 in Zwickau) is a German doctor and practitioner of sports medicine.  From 1968 to 1990 he was the team doctor of East German sports club SC Dynamo Berlin, and from 1971 was an unofficial member of the East German Ministry for State Security (Stasi) under the alias Jürgen Wendt.  After the reunification of Germany, Pansold worked for Austrian Sports Centre in Obertauern as the medic for all winter sports athletes.  In 1998 Pansold was convicted by the Landgericht Berlin for the doping of underage persons in nine cases, which led to a fine; Pansold was then released by the Austrian Ski Association (ÖSV) from his position.  Since 2003 Bernd Pansold has been active working for Red Bull GmbH as the director of the company's own Diagnostic- and Training center, in which professional athletes associated with the company Red Bull are attended to.

Arnold Krumm-Heller: Heinrich Arnold Krumm-Heller (April 15, 1876 – April 19, 1949) was a German doctor, occultist, Rosicrucian, and founder of Fraternitas Rosicruciana Antiqua (FRA), a traditional Hermetic order that operates in Brazil.  He also was a German naval intelligence agent during the Mexican Revolution and World War I.  A prolific writer, he published 25 esoteric books, novellas, history books, biographies, as well as countless articles in his magazine "Rosa Cruz" and similar publications.

Werner Daehn: Werner Daehn (born 14 October 1967) is a German actor with an international reputation, who has worked with Vin Diesel and Samuel L. Jackson in "XXX", with Jason Priestley in "Colditz" an ITV1 2005 miniseries, with Bill Pullman in "Revelations" and with Steven Seagal in "Shadow Man".  In addition he has also worked in German productions like "Stauffenberg - Rebellion of Conscience" (also titled "Valkeryie" on the German DVD) and "" (nominated in Germany for the ).  He appears momentarily in the film "The Lives of Others" by Florian Henckel von Donnersmarck.  He also took part in a British production for the BBC, when in 2011 he played the role of Dr Georg Maurer, the German doctor who treated the Manchester United players who survived the 1958 Munich air disaster.  In 2016, he played the role of Josef Von Zimmerman, in Game of Aces.

Schack Carl Rantzau: Schack Carl, "rigsgreve" (von) Rantzau or Carl Schack Rantzau-Ascheberg (11 March 1717, Ascheberg estate, Holstein – 21 January 1789, Menerbes, France) was a Holstein-born Danish officer and statesman.  He is notable for his friendship with Johann Friedrich Struensee and his role in the coup which led to Struensee's fall from power.

Claustre Affair: The Claustre Affair was a hostage crisis during the First Chadian Civil War.  Chadian rebels, calling themselves the Command Council of the Armed Forces of the North (CCFAN), lead by Toubou nationalist Hissène Habré kidnapped Françoise Claustre, a French archaeologist, Marc Combe, a worker in a French development organization in Chad, and Christoph Staewen, a German doctor.  Although Combe escaped and Staewen was ransomed back by the West German government, the rebels demanded a ransom of 10 million francs for Mrs. Claustre and her husband Pierre, who was later also captured by the rebels.  The case garnered international attention, with the French sending a negotiator that was later executed.  Finally the French appealed to Muammar Gaddafi to free the hostages, which he then did.  The affair showcased Libya's growing influence in Central Africa.

Àlex Brendemühl: Àlex Brendemühl (born 27 November 1972) is a Spanish actor.  Born in Barcelona to a Spanish mother and a German father, he has appeared in more than 60 films and television shows since 1995.  Brendemühl played the lead role of the Nazi war criminal Josef Mengele in the 2013 film "The German Doctor".

Maximilian Meyer Heine: Maximilian Meyer Heine (November 6, 1807 - November 6, 1879) was a German doctor, who served with the Russian Army during the Russo-Turkish War and who later became a Russian state councilor.  He was the youngest brother of Heinrich Heine, the famous German romantic poet.

Franziska Tiburtius: Franziska Tiburtius (24 January 1843 – 5 May 1927) was a German doctor, one of the first two women to qualify as a doctor in imperial Germany.

Johann Friedrich Struensee: Johann Friedrich Struensee (5 August 1737 – 28 April 1772) was a German doctor.  He became royal physician to the mentally-ill King Christian VII of Denmark and a minister in the Danish government.  He rose in power to a position of ""de facto"" regent of the country, where he tried to carry out widespread reforms.  His affair with Queen Caroline Matilda ("Caroline Mathilde") caused a scandal, especially after the birth of a daughter, Princess Louise Augusta, and was the catalyst for the intrigues and power play that caused his downfall and dramatic death.

Friedrich Jung (pharmacologist): Friedrich Jung (21 April 1915 – 5 August 1997) was a German doctor who became a leading Academic and Research Pharmacologist in the German Democratic Republic.

Supporting paragraphs: Schack Carl Rantzau Johann Friedrich Struensee
Answer: Johann Friedrich Struensee