The problem with that sort of suggestion is that by the time you're eating the food that high in this and the food that's high in that and the food that's high in the other, you've gotten to your ~2000 calories for the day and are still missing nutrients, plus your diet is infeasibly bland.

There are some things that if you can't get them from a normal diet are certainly most easily obtained from supplements. Vitamin D, depending on your location, is certainly one. There's reasonable evidence that magnesium is another. IIRC, there's a couple of others where even eating a normal healthy diet won't really get you to where you ought to be. There's also plenty of vitamins where unless you eat a really crazy diet, or you've got some sort of absorption disorder (I'm in that camp so I've had to learn more about this than I really would have cared to), you're never going to be deficient, because you get plenty. Vitamin C, for instance, is effectively impossible to be deficient in. There's a lot of ongoing debate about the virtues of doses higher than "not deficient", but you'd have to go out of your way to get scurvy in the modern world.