I tried running some silent film actors through the google bacon calculator, and quite often it came up empty or wrong. There's probably some high Bacon numbers among them, but you'll have to figure it out the old-fashioned way.
Lon Chaney, Sr.'s Bacon number is 3
Lon Chaney, Sr. and Kenneth Branagh appeared in The Unknown.
Kenneth Branagh and January Jones appeared in The Boat That Rocked.
January Jones and Kevin Bacon appeared in X-Men: First Class.
No way no how was Kenneth Brannagh in a movie with Lon Chaney Sr.