A few German picks:
Effi Briest (Rainer Werner Fassbinder, 1974): & Die Marquise von O (Éric Rohmer, 1976)
Two fantastic adaptations, a bold production from Fassbinder given his usual comfort zone, and beautifully shot. Rohmer's Marquise is an evasive mixture of mystery, morality and romance, as usual shot very attractively though with some budgetary limitations. Both are less accessible versions of the period drama than the formula we've become accustomed to in English productions. Rather than melodrama, or plucky feminist inserts, we're instead confronted with somewhat more authentic to the source material depictions of people trapped in their roles and coming to resolutions that (in the case of Marquise) will offend more 'sensitive' modern viewers.
The Lost Honour of Katharina Blum (Volker Schlöndorff, 1975)
A very fine example of the type of German film making of this era outside of the big three internationally-known directors. Attractively shot in rich colour, Katharina is intriguingly evasive during her strange encounter with the underworld and media hysteria. Functions fantastically as a character drama, without lapsing too much into the mechanics or process of the crime element.
Head-On (Fatih Akin, 2004)
An edgy but also sincere romantic thriller/drama set in the sub society of Turks in Germany and their homeland. I had expectations of a production derivative of Tarantino and French models, but the Romantic element is rather more deeply-felt, and its refusal to lapse into an easy resolution makes it just a great film, rather than a great genre film, despite its presentation. Despite first impressions, the lead female character eventually avoids the Wong Kar-wai pixie girl quality that I worried about after her initial scenes.
Bloody Friday (Rolf Olsen, 1972)
A wonderful piece of shit heist film. Shot surprisingly well, but acted with something between poliziotteschi style and the brutishness of exploitation fare. The lead actor is a force of nature, screaming at everyone, challenging them to fights, etc. The setups are primitive and functional, lots of nasty deaths and shoot outs, a general sense of total immorality with of course ends with a quote (this time from Napoleon) decrying the actions of people like the protagonists. It's a very rough and masculine film, a cult classic to some, though it lacks the outlandish or incompetent qualities that might be expected from that label.
The Lives of Others (Florian Henckel von Donnersmarck, 2006)
A very atmospheric and authentic realisation of Stasi-controlled east Germany. It focuses on a voyeuristic relationship between a playwrite and the agent assigned to bug and monitor his apartment. It has just enough melodrama to make it feel cozy without going too far, a very fine film.
Labyrinth of Lies (Giulio Ricciarelli, 2014)
An interesting concept - of the lack of knowledge of the Holocaust in 50s Germany, and also a cultural unwillingness to think about it, told through the eyes of a lawyer investigating a case. Unfortunately despite some high points (the actors, particularly the journalist friend, and the artist) it comes across as a light, televisual-style production, and while mercifully the moral righteousness of the main character is questioned, but the conflict can feel a touch contrived, and it all feels a bit humdrum. I'd still recommend it, but it's only an average film.
Knife in the Head (Reinhard Hauff, 1978 ) is next up when I get around to it, there are so many wonders hidden away in the 70s from Germany, not to mention the endless Edgar Wallace adaptations that I ought to be familiar with at least some of.
I love horror movies. I've seen multiple New French Extremity films, but my favorite by far is a movie called Inside (À l'intérieur, 2007). It's incredibly tense, atmospheric, with a great soundtrack. A truly brutal movie.
You've probably seen it, but I suspect you'll like Martyrs, it's a more committed and well-realised version of what recent (past two decades) English language productions occasionally try for (they trade on the language and visuals of 'messed up' but are usually very tame).