As you mentioned, this question has some issues, specifically, it is missing a huge factor - context. What armour and weapons are best for a medieval soldier depend on when and where you are, first of all. After all, the Middle Ages covers a thousand year period, and depending on your definitions of the 'global middle ages' covers either all Europe and parts of the Near East, or the entire wolrd.

But the problem of context and the diversity of possible contexts is not just due to the technology available, but because armour and weapons are adapted to the way of war of the society that produces and wears them. Looking outside of the Middle Ages, the Roman panoply - the scutum, body armour, helmet with check pieces and tail, pila and gladius - was adapted to the way the Romans fought. Similarly, the armour of English knights in the 15th century, which featured mostly symetrical arm defenses, good all around protection (but less reinforcement of critical areas) and good range of movement for the arms and shoulders, was adapted to fighting on foot as part of the larger English tactic of using archers to control the flow of battle and using dismounted men at arms to protect them. The lighter armour of later Swiss pikemen or Landsknechts is related to the need for mobility and the extent to which more regulated and disciplined formations protected the soldiers in them through discipline and coordination - for the Swiss especially, their form of warfare involved attacks with massed formations advancing quickly, so speed was important. But even within a particular historical context, the best armour and weapons also relate to your battlefield role. Individuals on the medieval battlefield are no isolated, they are members of a larger whole playing a particular role. Moving back to the example of English armies in the 15th century, archers would have a different and much lighter set of equipment than men at arms, because they would need greater range of motion in their arms and other flexibility to easily use their bows (as well as not having as much money as men at arms), generally a jack and a brigandine and a helmet. Even on a more individual level, what weapons will be most effective depends on what opponents you are fighting - a spear may be incredibly versatile and effective, until you need to fight armoured opponents and have no chances of penetrating their armour (at which point, you may wish you had a halberd, glaive or another weapon with a backspike that could concentrate all your force into a single point.

This is all to say, there is no single best 'load out' for a soldier across the entire Middle Ages. The best equipment is only ever 'the best equipment for a job' and what that job is depends upon the context a soldier is fighting in.