None of them are really fundamental. Some people feel that force is more fundamental than mass since force seems to be a "real" thing that happens while mass is

None of them are really fundamental. Some people feel that force is more fundamental than mass since force seems to be a "real" thing that happens while mass is just an abstract quantity that helps us predict forces. It's all human psychology, practical issues with measurement, and legacy. Quite a few of the base units are entirely redundant (candela, kelvin, mole) but we have them because of our human weaknesses.