I asked my baker for a croissant. "Butter or ordinary", she said with a depreciative tone on the last word. I bought the butter one... I propose ordinary or generic. Generic brands seem to be used in supermarkets.
But off-brandoff-brand by @Benjamin Harman is excellent.
EDIT: as the answer above is checked as the best (deserved), let me add options for the sake of completeness: for smartphones, cheap and low-cost are quite related to the fame of a brand. Fuels exist in regular and premium. Standard was my last option.