Iron Man vs Hulk
Iron Man has beat Hulk twice in the comics, so yes, he can win. He has lost more times than he has won, however.
Iron Man vs Venom
Iron Man is capable of emitting supersonic attacks which would be outright deadly to Venom. There is no believable way that Venom could beat Iron Man in the comics. Yes, he is strong but not enough to even hurt Tony through his armour. Also all his modern armours have no orafice exposed for the symbiote to enter.
Thor’s Defeat
Over 12 issues, Thor is defeated multiple times by the five new Phoenix hosts: Cyclops, Colossus, Emma Frost, Namor, and Magik. At one point, Colossus is even able to smash Mjolnir away from Thor’s hands, proving Phoenix is a strong force not to be messed with.
Thanos vs Iron Man
Tony Stark held his own against Thanos in the final scenes of Infinity War, but he was ultimately not able to keep up. Even without the Infinity Gauntlet, Thanos is far more powerful than any of the suits of armor Tony Stark has invented.
Thanos’ Power
He also mastered several forms of dark magic and matter manipulation, and is an accomplished psychic. So in the end, his immense power is a result of his own genius coupled with his mutant genes and powerful heritage. Thanos is a mutant member of the race of superhumans known as the Titanian Eternals.
Kang vs Thanos
Marvel’s Kang Is Not Stronger Than Thanos – But He Is Much More Dangerous. Thanos was one of Marvel’s most dangerous villains before he entered the MCU, but Kang the Conqueror is already a bigger threat.
Odin vs Thanos
Along with the secret reality-altering source of his powers, the Odin-force, Odin outclasses Thanos no matter how reluctant Thanos is to admit this. As an Eternal, Thanos has access to a substantial power profile. Thanos is a mutant member of the race of superhumans known as the Titanian Eternals.