I always think this varies massively from person to person. But for me:
Vinegars - balsmic, cider/white wine, sherry, malt
Oils - olive, rapeseed, general vegetable, chilli, garlic
Soy sauce, sriracha, hoisin, gyochang (or however its spelled), fish sauce, miso paste
Herbs and spices - to preference
Flour - self raising, plain, bread flour, cornflour
Sugars - granulated, caster, icing, brown, demerra
Almond meal, dessicated coconut , dried fruit and nuts
Noodles - rice and wok
Pasta - spaghetti, penne and usually at least one other shape
Rice - white and brown, risotto, paella
Lentils - usually red, sometimes puy
Pouches - for emergency use usually mixed rice or grains
Couscous
Tins - baked beans, sweetcorn, tuna, chopped tomatoes, cherry tomatoes, butter beans, canellini beans, chickpeas, coconut milk
Also - 1 or 2 of fruit (any kind) for emergency crumbles, smoothies etc
Passata
that's my bare minimum I think.