I asked a similar question in this sub which you might be interested in: "How Did The Nazi Government Interact with Titled Land Owners in Germany?"

There were of course nobles who sided with the Nazis, most infamously Charles Edward, Duke of Saxe-Coburg and Gotha and Prince August Wilhelm of Prussia.

That picture however would be incomplete. Even though many aristocrats initially supported the Nazis, many even of those soon became disenchanted. Count Stauffenberg himself started off as a supporter. In the 1930ies, the noble German families made up 0.15% of the population. They did however make up about half of the participants in the two plots against Hilter, 1938 and 1944. Particularly East-Elbian and Catholic aristocrats seemed to be willing to resist the Nazis. After the plot of the 20th July 1944 Hitler is quoted as remarking "it is my deeply held belief that my enemies are the 'Vons'" (i.e. the aristrocracy).

A short summary can be found here. A contemporary news report is available here. Two books from two different perspectives would be:

Jonathan Petropoulos: Royals and the Reich: The Princes Von Hessen in Nazi Gemany. 2006, Oxford University Press - ISBN 0195161335

Freya von Moltke: Memories of Kreisau and the German Resistance. 2003, University of Nebraska Press - ISBN 9780803246690

Hitler was considered a rabble-rouser and left-winger. But in the early thirties extreme politics became more popular and Hitler cleverly positioned himself as an alternative to the actual socialists. A key relationship was that between Kurt von Schleicher, Franz von Papen and Paul Hindenburg. All conservative military men. Before the rise of Hitler, Kurt von Schleicher had led a series of conservative governments. The failure and unpopularity of Schleicher as the Depression took hold caused him to appoint von Papen in his place, but in elections in 1932 they were unable to gain a majority and the Nazis became the largest party.

Von Papen was confident he could control Hitler and had Hindenburg, Germany's most powerful political figure, appoint a government with Hitler as Chancellor and von papen as vice-Chancellor.

Schleicher and von Papen misjudged their own ability, and the ruthlessness of the Nazis. They also sought to align themselves with Ernst Rohm, the leader of the paramilitary SA which Rohm wanted to become the core of the new German army.

Matters came to a head on the Night of the Long Knives, which history remembers as the 'beheading' of the SA by the SS, as Hitler threw off his brawling street-thugs and sought a new, more disciplined security force. He was now in power, had immediately destroyed unions and socialist parties, and no longer needed these agents of chaos. What is less well remembered to that Hitler also used the occasion to purge the conservatives whose approval had helped put him in power. Schleicher was killed, von Papen, a member of Cabinet, had his office ransacked and his secretary shot in front of him. Several of their associates were also killed.

This is the political nitty gritty of how the political battle was played out by those who represented the aristocrats. In Germany the aristocracy was not like in other parts of Europe. It was closely aligned with the military, but it in general was not very wealthy nor as powerful. Landholdings were small and productivity low. Germany was an industrial country, producing powerful industrialists, and its education system greatly encouraged advancement on merit and tended to undermine the class system. Many of those with 'von' in their titles had gained their status for military reasons and their hold on this status was fairly tenuous.

As is usually the case, conservatives aligned with the racists and thugs as the palatable alternative to socialists who wanted to tax them, or take away their status.