Beck
Stauffenberg
Olbricht
Goerdeler
Tresckow
Fellgiebel
Leber
Oster
Haeften
Bonhoeffer
Bolz
Loeser
Boeselager
Benardis
Status of OTL July 20th Conspirators:
Beck: He is initially involved in the scholarly study of the Great War under Hoffmann before falling into the circle surrounding von Seeckt and by extension Crown Prince Wilhelm. Beck is deeply involved in the internal politics of the German military, proving a particularly adept intriguer, involved in the internal machinations and power struggles amongst the officers surrounding the Crown Prince. He holds a General Staff.
Stauffenberg: He joined his ancestral regiment in 1926 as per OTL and joins the Georgkreis as IOTL. However, differently from OTL this Georgkreis is part of the wider German Freedom movement and as such Stauffenberg ends up part of that whole political movement ITTL which has a growing presence within military circles. He is a rising military officer, but isn't really in a position to hold much influence at this point in time.
Olbricht: He doesn't reach anywhere close to the prominence he got OTL because the Versailles Treaty cuts don't occur in TTL. He is one of the many mid-range officers in the General Staff who supports the Lossberg wing of the military.
Goerdeler: He leaves the military as per OTL and begins his career as a conservative politician in the DKP. He doesn't join the DNVP, lacking the same sort of radicalizing impetus of OTL, and by the mid-1930s has risen to being a mid-level figure in the Conservative Block. Not a leading politician, but a rising one. He is pretty firmly stuck in the mainstream current of the Conservatives.
Tresckow: He leaves military life post Great War as per OTL and spends the next while studying and throwing himself into business. He doesn't marry into the Falkenhayns and instead ends up on the edges of the German Freedom movement politically while building up business and social connections across the Zollverein. Tresckow is well on his way to being a financial magnate by the mid-1930s and a prominent figure in the expat communities of eastern Europe.
Fellgiebel: He is a forceful and upwardly mobile officer associated with the von Kuhl wing of the military, proving a leading proponent of communications technology and the continued development of signal systems. He has matched his OTL achievement of becoming a major general in 1938. He is set to be a major figure in the post-Kuhl/Lossberg days of the military.
Leber: He follows his OTL trajectory into the SPD and political leadership, remaining as engaged with defense policy as OTL. He has risen to a middling position within the SPD's more defense oriented figures. Perhaps in a new SPD government he might get some considerations as a longshot for a lesser ministry.
Oster: He remains in the military ITTL and after the whole Krivitsky Case transfers into the German intelligence services.
Haeften: Remains in civilian life as a banker ITTL.
Bonhoeffer: He spends time in the US like IOTL before returning to a teaching position at the University of Berlin. Later, following the Abyssinian civil war, he is brought in to advise on the situation in the country and eventually dispatched to serve in the embassy there. His writings are less openly focused on martyrdom and "costly discipledom" and more on the liberal, socially-supportive and missionary elements of his thoughts.
Bolz: He is a politician in Würrtemburg as per OTL and grows into a pretty significant proponent of the Revolutionary Catholic Church in Germany. He isn't a national presence, but definitely a regional figure of significance. His interests in the RCC do make him too controversial to become the Staatspresident of Württemberg.
Loezer: He joins the fighting in Russia in the early 1920s and serves with distinction. Following that he remains a part of the German Luftstreitkraefte and has by the late 1930s risen to a senior inspectorial position as in OTL.
Boeselager: He is barely twenty at this point. Just joined the military in 1939, driven by the outcry over the Krivitsky Case.
Benardis: He is another of those junior officers just starting to emerge.