Samsung don't really offer a good phone for gaming, most android games are optimized for snapdragon SOC which Samsung phones don't come with in Europe, if it has to be a phone I would go for either an Asus ROG phone or red magic which are specifically gaming phones, if your open to using a tablet the S7 uses the snapdragon 865 which is one of the best SOC for a mobile platform and offers great gaming performance along with battery and thermal efficiency
