If your intended course is either Art History or Law, I don’t think Imperial fits within your list. UK is very rigid in terms of the grades they want you to have. All the universities you have mentioned should have relatively “nicer” grade requirements IF you choose to study Art History, maybe not so much with Cambridge and Oxford, but considering how high your grades need to be for the sciences, Art History is significantly better. Law, however, is a completely different story. So you seriously need to figure which course you want to study first, since that affects what you write your Personal Statement on and obviously your university choices.