Dragon Age: Inquisition seals many paths behind barriers that only a specific class can unlock, so you will want at least one warrior, rogue, and mage at your disposal.
If you don’t have a preference between the three base classes, it may be best to make your decision based on the followers you want to use in your party. Do you prefer to charge headfirst into battle? Or do you want to sling fireballs from across the Hinterlands? The Dragon Age series challenges players to make narrative decisions, but choosing your character’s class can be just as difficult as crowning a dwarven king.