1. Thanos (With Infinity Gauntlet)
This was a tough decision because if Thanos doesn’t have the Infinity Gauntlet, Dormammu would kill him easily. With the Gaunlet and Stones, all Thanos has to do is snap his finger and he is gone. So I made the executive decision of saying he’s number one because of the Gauntlet. Otherwise he would be two.
While he would not be a match for Dormammu, on his own, Thanos is still very powerful. He’s strong enough to take on and beat the Hulk, and he’s also a master battle strategist. His determination to win is also very high. As we saw in Avengers: Endgame, he would sacrifice his own troops just to win or get out of a tricky spot. Other than Dormammu, Thanos, on his own, would be able to beat Ego, Surtur or Hela.