The Anglo-American armies share ranks up to "full" (or four star) general. (The German army has ranks equivalent to those armies for non-general officers). The American army deviated from the English pattern with a five star "General of the Army." This rank was created after the Civil War, first award to Grant and then Sherman, enabling them to outrank four star General Robert E. Lee. A "super five" star rank, General of the Armies, was created as a result of World War I for General Pershing who outranked Grant and Sherman (and later five star generals). In 1976, a BiCentennial Congress retroactively awarded George Washington "super five" star rank with effect before Pershing's, making him the most senior U.S. general.
What were German World War II ranks? Is Major General a division commmander, Leutnant General the equivalent of an Anglo-American Lieutenant General? What level is Colonel General? Where would Field Marshal fit on the four or five star continuum? Is there any rank higher than Field Marshal? And is it true the Germany (not just Hitler) never appointed any more Field Marshals after Paulus surrendered at Stalingrad?