All of them.
The syllabus covered practical skills, appreciation of the arts, and science. This was in a reasonably balanced way. It gave me lots of choices for the future. Choices I am still able to make today.
Even History, and Geography relate to economics and politics. If you need to understand the business world you need to have a grasp of the wider picture. Even Religious Education fits in to the global economy, as our syllabus also covered other major doctrines like communism.
Woodwork, Metalwork, Engineering Drawing. Both the practice and theory get used a lot in my non work roles. They also enhanced visual and spacial awareness, the former helpful in our more visual information world today.
Physics, Biology, and Chemistry help me understand the world we live in, they help me explain things, and I have used them in furter study.
English language, basic communication.
English literature. This actually helps a lot with the subtlety of English language usage and feeds communication skills. An appreciation of the arts.
Art. The basic use of colors, the color wheel, some appreciation of art (if limited).
French, German, and Welsh. My worst subjects, however the study of language became more important to me in later life. This has made me more culturally tolerant as well.
People used to mock wood/metal/needle work and domestic science, but these are life skills. Even if not used in our careers they make our lives easier and save us money, 'a penny saved is a penny earned' as they say.
The only thing I don't use much today is PE. But there is an indirect lesson about work life balance, lost by todays education in its race up the league tables.