During Raymond Mason’s 20 years of acting in the ITV soap opera Crossroads, he played five different roles. “I don’t think anyone ever noticed,” he said, “and I don’t put it down to versatility.” For trained actors in the days when there was just a handful of drama colleges and fewer vocational courses, the pool of talent was by definition smaller. Many performers found themselves appearing more than once in the same programmes. For Raymond, the roles that he played on British television over 40-odd years numbered more than 1,000, and he appeared in scores of commercials at home and overseas.
One of the reasons for Raymond’s success was that he was comfortable in a supporting role and, crucially, adept at not stealing a scene. Through a combination of timing and practised self-effacement he allowed the main star, or joke, to shine. Modest about taking the credit, he effectively enabled the skit.
Biography from Wikipedia, CC BY-SA. Credits and photos from TMDB.
The titles people know Raymond from.
IMDb rating of each title on Cineora, by year.

as Thommo · 1 episode

as Eric

as Len Rawlinson · 1 episode
as Salesman · 1 episode
as Stoat · 1 episode

6 episodes

as Pig Farmer · 1 episode

as Neighbour
as Headmaster · 1 episode

as Registrar

as Reg Palmer · 6 episodes
as Porter
as Mr Harris · 1 episode
as Reynaldo
as Mr. Adams · 1 episode

as Peter Stenhouse

as Vavasour · 1 episode

as Bank Manager · 1 episode

as Charles Cheeryble · 3 episodes

as Mr. Lightbody

as Arthur
as Mr. Zebedee · 1 episode

as Third Man · 1 episode

as Dr Tomkins · 1 episode

as Rent Steward · 1 episode

as Telescreen Announcer · 1 episode
The people who keep turning up in Raymond’s titles.