Additional question: were there any similarly right wing groups/parties in the Weimar Republican that were equally nationalist and anti-semitic/anti-communist that also sought restoration of the Monarchy?
Much of the Wehrmacht Officer class was very conservative, in the traditional sense of the term, and agreed with the Nazis's Nationalistic stance, but disagreed with the socialistic aspect. There were some Wehrmacht generals who were proponents of restoring Imperial Germany, but the overwhelming majority just wanted to see Germany return to greatness - regardless of who was in power. The old Prussian military ruling class at times were vehemently against Hitler, especially after he politicized the Wehrmacht and made them swear personal allegiance to Hitler first, and not Germany first. The Prussian / German military went back centuries, and was a proponent of putting Germany's needs first, above all, including politics. They were supposed to remain apolitical, and loyal to Germany. Many officers, including the famous Claus von Stauffenberg believed Hitler was not only dooming Germany's people, but was also dooming their culture, and perverting the military. A lot of theorists who question if the July 1944 plot to blow up Hitler succeeded, theorize that the Germans may have ended the war and would have at some point gone democratic or worked within the party. Reality was that the Military was very conservative, and after ousting the Nazi party, they would have probably propped a military tribunal to rule over Germany. They would have most certainly continued the war against the USSR, even if the western allies accepted a partial peace (which they wouldn't have).
But any way back to your point, yes many Germans, especially the ruling Prussian military elite class were pro restoration of the monarchy at first. However, that was not gaining momentum, so they allied themselves with the Nazis as the Nazis were rising to power, and then were gobbled up by the Nazis and adsorbed in to the system.
Hindenburg was a prime example of someone who was nationalistic, but supported monarchism, slightly apposed Hitler (who saw as a thug and lowly corporal), but who was willing to work with the Nazis vs. the Socialists and Communists.