Mephisto (Hungarian/German) with Klaus Maria Brandauer
For comedy you could try: Der bewegte Mann
Or you could try a televisionseries like Berlin Alexanderplatz, which was highly praised, directed by Rainer Werner Fassbinder.
Just bought Buddenbrooks myself, but have not watched it yet.
Same goes for Wolke 9 (Cloud Nine) which received very good reviews.
edit: Did anyone mention Die Blechtrommel? A real classic. Novel written by G