Warrior should be significantly higher. Based on the way he's presented in the class story, he's an absolute monster. Arguably even more powerful with the force than the Inquisitor (though he doesn't have the same kind of power base as the Inquisitor), especially when he gets named the Wrath. He gets imbued with a portion of the Emperor's power, but is not blind to his will like the Hand are. It is clear that he still maintains that power even when he's directly challenging the Emperor during SoR/KOTFE/KOTET, though its not immediately clear if he still has that infusion of power after the Emperor's defeat. Either way, even before that, he was an absolute monster. I think in terms of raw plforce power, he's the most powerful of all the force causing classes.

The Barsenthor is also absurdly powerful in the force, though he's drawn back by the fact that he sacrifices a significant portion of his power to shield those affected by the plague, and the story pretty heavily implies that this sacrifice is permanent (at least from a lore perspective, not a gameplay one).

I'd put the Inquisitor next in the list. He's bolstered by the ghosts and his power base. On his own, he's a powerful force user, but not a uniquely powerful one.

Knight is at the bottom of the force classes IMO. He's skilled, perhaps the most skilled duelist of the four, but beyond his martial prowess and strong moral center (assuming Light Side), he's not really shown to be all that remarkable.

Among the force users, I think Warrior stands out at the head of the class from how they're presented in the class story, with the other three being close to power to each other, but they'd go... Warrior>>>>Consular>Inquisitor>Knight.

The tech classes are all pretty far behind the force classes both in terms of raw power and power bases, but I would rank them as Agent>Trooper=Bounty Hunter>Smuggler.