The Red Baron (2008)
The Red Baron is a German-produced biopic about Manfred von Richthofen filmed in English with German actors. That sentence describes most of what is right.
Actor: Matthias Schweighofer
Matthias Schweighöfer played the Red Baron in the 2008 film and has since become one of Germany’s most successful actor-directors, running his own production company. Army of the Dead and Army of Thieves gave him international work, the latter of which he also directed.