There is no “best” brand or variety except the one that suits your dog.
If I were to feed dried food I would probably choose Orijen as it is grain free (you can get it at Zooplus) however this is very expensive.
Alternatively JWB do two grain free varieties.
Basically one without any unecessary additives, preservatives, colourings, salt, sugar, preferably one grain if using cereals in the following order of preference oats, rice, avoiding if possible wheat, maize and barley.
Of course some dried foods use potato or tapioca instead of cereal.