There’s a West German movie about the Wansee conference as well. Both are chilling.
Branaugh nailed Heydrich in “Conspiracy”. When he threatens attendees at the conference, he just uses his eyes. Other excellent cast members are Colin Firth as Stuckart, and Stanley Tucci as Eichmannn.
The best Heydrich portrayal, although he didn’t really look much like him, was David Warner in “Holocaust.”