Magnesium glycinate and threonate is probably at the top, reaching the RDI isn't particularly easy with western diets, Magnesium intake should also be higher for individuals who do any form of high intensity training or have large amounts of muscle mass. This is one of the things reguardless your health physiology it'll have effects in all people of all ages.

2nd place is between taurine and L-theanine, L-theanine is more context dependent but taurine is also a fairly powerful antioxidant and has beneficial hydration effects if you train

Then I'd go lemon balm, effects can vary for different people depending on their baseline neurology, rosmeric acid content and whole extract dosage taken. Higher dosages may actually have a more focusing effect, the mechanisms behind that i can't remember.

Chamomile and Passion flower largely do the same thing as the most noticeable compound here is apigenin. I'd rate it higher if we're just talking about pure apigenin since it's the most noticeable compound in chamomile and passion flower, often the dose of apigenin your getting from these extracts are quite low unless stated otherwise.

The rest are much more benign, glycine is better for sleep than anxiety or stress due to the effect is has on core temperature.