10 Characters Who Have Defeated Thanos
3. Galactus
In a rare switch-up, Thanos joined the side of good for a moment or two during his mini-series, simply titled Thanos.
During the events of this mini-series, an evil force has corrupted the mind of other-big-baddie, Galactus, and convinced him to do his bidding in order to free himself from his planet-eating-addiction. When Thanos learns of this, he goes to confront Galactus to try and snap him out of it.
The conversation quickly turns violent, as Galactus attacks Thanos. Thanos, surprisingly, is able to hold his own even without the gauntlet for a good while. He even withstands a full-on blast of Galactus' power at one point. But after multiple attacks from such a powerful force, Thanos is bested, with one Galactus' energy blasts flooring him and leaving him battered and bruised.
He's beaten so badly here that he even has to sweet-talk/beg Galactus to spare his life in the aftermath. Galactus reluctantly agrees but leaves Thanos completely defeated.