Scaramouche is an excellent film, better than the sound remake in my opinion, though that movie is also good. I just prefer Ramon Novarro in the lead and think the romantic subplot and plot twist were handled much better in the silent version.
I've never seen Greed, though I love von Stroheim as a director so I am looking forward to doing so. However, is it the shortened version they're playing? I know the most complete cut that exists is four hours long.
Sherlock Holmes was, for me anyway, a disappointment. John Barrymore looks so bored in the title role, there's way too many intertitles, and Carol Dempster shares no chemistry with Barrymore.
The Passion of Joan of Arc is a classic though, a haunting look at the saint. Essential viewing.