No. He never starred in a film with the word Tombstone in the title. W. C. Fields died in 1946.
W. C. Fields played as Egbert Souse' .
Man on the Flying Trapeze (1935)
There is no reference to W C Fields playing Scrooge. However, there is an entry of Christmas Carol (1978) (TV) Played by Rich Little (as W.C. Fields as Scrooge). Fields did play Wilkins Micawber in MGM's David Copperfield
Carl C. Fields has written: 'Fields and Associated families'
David C. Fields was born in 1937.
Step brothers
W. C. Fields was born on January 29, 1880.
C. Virginia Fields was born on 1945-08-06.
Arthur C. Fields has written: 'World without heroes'
It was written by W. C. Fields under the alias Mahatma Kane Jeeves.
Treasure of the Sierra Madre
In the movie starring George C. Scott it was the crippled boy's father. I don't know if this is the same as the play.