I think all of them are important, none being more important than any other. (Such a cop out I know, but let me explain…)
Each science will teach you something different about the world we live in, which will give you a greater understanding of what’s around us. Why things happen and why things are the way they are. Each science will also teach you a slightly different way of thinking about things and where there are gaps for you to explore and fill with your knowledge.
For different careers, of course some are more important than others. For instance, as an engineer you need to understand Physics, but if you want to do Chemical Engineering you’ll need Chemistry too or if you want to work with stem cells and do the biological side of Bioengineering, Biology is important too.
I hope that makes sense!