What is the best A-Level combination that can be used to get into a huge variety jobs/unis?
Well if it’s variety you are seeking then English or a writing subject, Maths, and another facilitating subject, maybe a science or something else you are interested in. Be aware that this is not a good option if you have a feeling you may want to do something, but are not sure, as a lot of degrees, particularly in STEM will require specific A-Levels which you may not have chosen.
Basically, i wouldn’t recommend picking A-Levels purely on variety unless you have absolutely zero idea what you want to do, as it can lead to problems in the future, and you may dislike the subjects you picked, which is never good.
I often say to people that are unsure of what they want to do, to first rule out what subjects they dislike, even if it’s only a few, it can narrow your selection.
But overall, you don’t have to listen to me, do what you think is right, but please do your research first.