Unfortunately, most of the sites that claim to aggregate such information are heavily incentivized to misrepresent or falsify information in order to sell you supplements, either directly sourced or through affiliate programs.

Many of the remainder are constrained by politics or medical malpractice law. For instance, USRDA recommendations and USDA gimmicks like the food pyramid are heavily influenced by agricultural businesses. Minimum daily requirements are mostly based on the amounts needed to avoid showing symptoms of known deficiency diseases, rather than to actually be healthy.

The actual scientific research is rather sparse. I am aware of a study performed in the 1960s that completely replaced all meals with a nutrient slurry with the texture of corn syrup, which was partially spoiled because subjects were convincing accomplices to smuggle real food to them. Thanks to subject compliance issues, most long-term research is done on analysis of food-diary observations and surveys. Short-term research, such as for satiety and glycemic response, is more controllable.

You will have to do a lot of your own digging.

Start with professional athletes like swimmers, cyclists, and bodybuilders, but beware the "broscience". Look at the life extension people that use caloric restriction and intermittent fasting. Check out the Soylent people. Look at the practice of geophagy. Listen to some vegans. Study some biochemistry, especially the Krebs cycle and the known DNA repair and disease-fighting mechanisms. Do a lot of Wikipedia walks.

Be aware that your nutrient requirements will vary from others as a result of your personal genetic quirks, but mostly can be expressed as a ratio of mass to ingested kcal.

Learning the biochemistry is key. You have to know that omega-3 and omega-6 fatty acids use some of the same enzymes at particular steps in their metabolic chains, so those fats will compete with one another in your body, meaning that those nutrients must be in a balanced ratio to each other, regardless of your absolute consumption. What's the best ratio? I don't know. Cursory analysis suggests that 6 parts omega-6 to 1 part omega-3 is too high. Supplementing with krill oil, algae oil, chia seed, or flax meal would therefore be as warranted as cutting the amount of omega-6 from vegetable oils.

If you look at Na+/K+-ATPase, it actively transports sodium and potassium across the cell wall until the interior is mostly K and the exterior is mostly Na. Your dietary requirements are likely related to the homeostasis mechanisms for regulating the ionic concentrations. What's the best ratio? I don't know. Cursory analysis suggests that your body requires overall 2.25 times as much K+ as Na+ at any given time, but the K+ is more strongly conserved, being mainly inside your cells. So you should probably eat a ratio similar to that found in your extracellular fluid, which is 33.5:1 Na+:K+, which indicates that your table salt should probably be at least 1:24 KCl:NaCl by mass. Sea salt provides some K, but not that much--about 1:200. And it also shouldn't be more than 3:1 KCl:NaCl by mass, even if you are severely deficient, because your body needs the Na+ to be present to pump K+ into the cells.

It's all guessing, and the signal-to-noise ratio is very low.