
Leonidas Frank "Lon" Chaney (April 1, 1883 – August 26, 1930) was an American actor and makeup artist. He is regarded as one of the most versatile and powerful actors of cinema, renowned for his characterizations of tortured, often grotesque and afflicted, characters and for his groundbreaking artistry with makeup. Chaney was known for his starring roles in such silent horror films as The Hunchback of Notre Dame (1923) and The Phantom of the Opera (1925). His ability to transform himself using makeup techniques that he developed earned him the nickname "The Man of a Thousand Faces".
Description above from the Wikipedia article Lon Chaney, licensed under CC-BY-SA, full list of contributors on Wikipedia.

The Phantom of the Opera
1925 · as Erik, The Phantom

The Hunchback of Notre Dame
1923 · as Quasimodo

Hollywood Story
1951 · as The Phantom (archive footage) (uncredited)

Treasure Island
1920 · as Blind Pew / Merry

The Horror Show
1979 · as (archive footage)

The Unknown
1927 · as Alonzo

The Unholy Three
1925 · as Professor Echo / Granny O'Grady

The Trap
1922 · as Gaspard the Good

Lon Chaney: A Thousand Faces
2000 · as Self (archive footage)

Richelieu
1914 · as Baradas

Victory
1919 · as Ricardo

He Who Gets Slapped
1924 · as Paul Beaumont

The Blackbird
1926 · as Dan - The Blackbird / The Bishop

Shadows
1922 · as Yen Sin

Universal Horror
1998 · as (archive footage)

While the City Sleeps
1928 · as Dan Coghlan

Bela Lugosi: The Fallen Vampire
2007 · as Himself (archive footage)

The House That Shadows Built
1931 · as (archive footage)