OK I did some research (which took hours, hence the silly time of the post). Here is the ones I have got.
A note about the Doctor Who; the names are of the serials. I have left out where they appeared in some episodes but the serials are no longer complete. Also I do not have all the serial (some are yet to be released on DVD) but been as it took so long I thought I would add them for a future date.
Also re: Keeping Up Appearances. In the USA they named the episodes, but in the UK they named them (for example) "Series 1 Episode 1". Consequently on some sources they vary the title, for example the episode with Clare Kelly in is named on imdb as "Skis" but is also known as "Sister, Sister". So to avoid confusion (and been it is a UK programme) I have not named the episodes.
Upstairs Downstairs:-
Alastair Hunter (Word of Honour)
Alethea Charlton (Board Wages)
Anthony Woodruff (Guest of Honour; Peace out of Pain; The Understudy)
Brian Osborne (Married Love; For the Love of Love; The Path of Duty; On Trial)
Charles Lamb (I Dies From Love)
Colin Rix (The Swedish Tiger)
Edward Underdown? (News From the Front)
Elaine Donnelly (Noblesse Oblige)
Jack Le White (A Place in the World)
John Lyons? (Home Fires)
Walter Horsbrugh (What the Footman Saw)
All Creatures Great and Small:-
Ann Way (Ways and Means)
Betty Turner (Every Dog His Day)
Brian Osborne (The Prodigal Returns; A New Chapter)
Charles Pemberton (Mending Fences)
Colin Douglas (Pups, Pigs and Pickle)
Elaine Donnelly (Brotherly Love; Bulldog Breed)
Frederick Treves (Matters of Life and Death)
George Malpas (The Bull with the bowler hat; Cats and Dogs; Dog Days)
Gorden Kaye (Pups, Pigs and Pickle)
Harold Goodwin (Place of Honour)
Harry Markham (Alarms & Excursions; Practice Makes Perfect)
Howard Goorney (A Friend For Life)
Ivan Beavis (Two of a Kind)
James Ottaway (Horse Sense; Two of a Kind)
Joe Ritchie (Sleeping Partners)
John Barrett (Every Dog His Day; Breath of Life)
Larry Noble (Will to Live)
Mollie Maureen (Will to Live)
Norman Mitchell (A Present from Dublin)
Paul Luty (Horse Sense)
Peter Schofield (City Slicker; The Last Furlong)
Ray Mort (The Playing Field; Puppy Love)
Ray Witch (If Wishes Were Horses; Hair of the Dog)
Ted Carroll (The Jackpot; Horse Sense)
Rio Fanning (Brotherly Love; Cats and Dogs; Advice & Consent; Golden Lads and Girls)
Rosamond Greenwood (Ways and Means)
Ruth Holden (Food for Thought; The Salt of the Earth)
Stan Jay (Sleeping Partners)
Terry Cantor (Tricks of the Trade)
Tony Steedman? (Brink of Disaster)
Walter Sparrow (Blood and Water)
Flambards:-
Anthony Woodruff (The Edge of the Cloud & The Cold Light of Day)
Peter Copley (The Inheritance)
Ted Carroll (Point to Point)
Ron Pember (Prisoners of War)
Keeping Up Appearances:-
Clare Kelly (series 5 episode 5)
Geraldine Newman (series 4 episode 4)
Gretchlen Franklin (series 1 episode 4)
James Ottaway (series 1 episode 1)
John Barrard (series 4 episode 4)
Doctor Who:-
Alethea Charlton (An Unearthly Child; The Time Meddler)
Arthur Hewlett (The Trial of a Time Lord: Terror of the Vervoids; State of Decay)
Charles Pemberton (The War Games; The Tomb of the Cybermen)
Christopher Coll (The Mutants; The Seeds of Death)
Clifford Rose (Warriors Gate)
Colin Bell (Invasion of the Dinosaurs; The Sea Devils)
Colin Douglas (Horror of Fang Rock)
Daphne Oxenford (Dragonfire)
Edward Underdown? (Meglos)
Frederick Treves (Meglos)
Fulton Mackay (Doctor Who and the Silurians)
Geoffrey Morris (Planet of the Spiders)
Godfrey James (Underworld)
Janet Hargreaves (The Greatest Show in the Galaxy)
John Cater (The War Machines) Note: he only died this year
John Stratton (The Two Doctors)
Keith James (Inferno)
Leslie Dwyer (Carnival of Monsters)
Leslie Schofield (The Face of Evil; The War Games)
Neil Hallett (Timelash)
Norman Atkyns? (The Sea Devils; Colony in Space)
Paul Whitsun-Jones (The Mutants)
Reginald Barratt (Planet of Giants)
Rio Fanning (Horror of Fang Rock)
Ronald Leigh-Hunt (Revenge of the Cybermen; The Seeds of Death)
Walter Randall (The Invasion; Inferno; Planet of the Spiders; The Aztecs)
William Mervyn (The War Machines)
Misc:-
Brenda Cowling (Goodnight Sweetheart - The Bells Are Ringing)
Margery Mason - (Harry Potter and the Goblet of Fire)