Stan & Babe (all of their available titles, including the foreign-languages versions - the last ones being the German-language version of "The Laurel-Hardy Murder Case", available on DVD in Germany, and the Spanish version of "Pardon Us", available on DVD in Spain)
Karloff (all of his availables titles, including TV series, TV-movies, etc. - fantasy/horror or not)
Tod Slaughter (proportionally, of course - he made only a little number of movies - I have all the available titles, and some not available)
Peter Cushing (most of his movies)
Barbara Steele (most)
WC Fields (most)
Maureen O'Hara (most)
Lon Chaney (almost all the available titles)
Lon Chaney Jr. (almost all his horror titles)
Christopher Lee (many, mostly horror)