Some names mentioned here, resonate on a personal level, definitely Enid Blyton I think I read all of hers throughout my childhood before moving on to Agatha Christie in my teens.
The Beatles of course! and to a lesser extent a lot of the others around the same era, later on David Bowie.
Mary Quant (although she was somewhat unaffordable regrettably when she was at her peak and I was still at school
Later on though Barbara Hulanicki founder of Biba, I did buy a few things at that store and loved the whole unique look that she established.
Terence Conran, I loved Habitat in it's heyday and Anita Roddick's Body Shop products.
Delia Smith, particularly her three part guide to cooking, that was around the time I had my first home and became interested in producing meals.
Simon Schama for that wonderful series on the history of Britain.
David Steel, is there another one? other than the Liberal leader who knew all about what Cyril Smith got up to, shocking!