Norah Lofts :- The Town House, The House at Old Vine, The House at Sunset. Her trilogy about all the people who lived in a house from about 1200 to the 1950s.
Norah Lofts :- Bless This House, in a similar vein.
Monica Dickens :- The Listeners, about the Samaritans.
George R Stewart :- Earth Abides. The story of a few survivors after a disaster wipes out nearly all of the population. But it is not the usual disaster story, where the few survivors go round shooting people. It is about a small group who try to build a new community, against all the obstacles; failure of the water and power supplies, plagues of insects, lack of food etc. The 'hero' tries to keep the next generation literate, but through the years all they want to do is play, and live off tinned food scavenged from shops. One day he makes a game of making a bow and arrow, and on the day one of the children shoots a rabbit he knows his tribe will survive. I read this book once a year, and have done for the last 50 years, since I found a tatty copy at a jumble sale. It is still available on Amazon.
