There’s not really any way to say universally what supplements people should take since it depends on the specifics of your diet, lifestyle, age, genetics, etc. Vitamin D is probably the most broadly useful supplement (it’s also the only supplement pediatricians recommend across the board for children). Best way is to just get a basic blood test, that will show your specific levels of the various vitamins and tell you what you need to increase, either through supplements or dietary changes.