Big fan. Passion de Jeanne d'Arc is an all-time favorite.
Look up Victor Sjostrom's work, he is perhaps the most accomplished director of the silent era. Terje Vigen (released for English speaking audiences as 'A Man There was') is perhaps my favorite. The Phantom Carriage was groundbreaking, and The Wind was surprisingly good.
If you like Dryer (who did Passion of Joan of Arc), another good silent work of his was Vampyr. Surreal and Lovecraftian, but not nihilistic.
Most good silent films are not American, I've noticed.
I've been meaning to watch
Vampyr but never sat down to do so.
It's no wonder good silent films aren't American, since Europe was the center of the world in that era. And speaking of Lovecraft, there's actually a recent silent film adaptation of
The Call of Cthulhu from 2005 which is really good.
Dont forget Metropolis! esp the restored version with lost now found footage.
I've watched that version! Extremely good. I withheld mentioning it since its a very Masonic film.