Avengers: Infinity War - 10 MCU Heroes Strong Enough To Face Thanos
3. Vision
Vision wields the power of an Infinity Stone - the Mind Stone - and is able to use it to blast beams of energy at his opponents. He isn't susceptible to bullets or blades due to his vibranium body, he can fly, and, he can increase or decrease his own density at will, to make himself more durable or more lightweight.
The power of the Mind Stone (should he still have it at this point) would be enough to damage Thanos by itself, but when you factor in these other abilities, it's easy to see Vision taking down the Mad Titan single-handedly.
He can fly out of the way of Thanos' attacks (or absorb the force of his punches), can withstand any projectiles thrown his way, and if he needs to, he can make himself light as a feather so he's even more agile.
At face value, there's no reason for him not to be number one. Well, that's until you take a look at this...
Vision isn't ranked higher because the Infinity War trailer showed him at the mercy of Corvus Glaive - and that's Thanos' right-hand man. If he's able to be subdued by a lackey, won't the man himself have just as easy a time?