Several characters in the Marvel Universe have the power to defeat the Sentry, despite his immense strength and godlike abilities. Notable heroes and villains who have either canonically beaten or are theorized to be capable of beating the Sentry include:
- Thor : The God of Thunder has defeated the Void, the dark entity linked to Sentry, and his power level is sufficient to take down Sentry himself
- Doctor Strange : As the Sorcerer Supreme, Strange's mastery of the mystical arts and reality manipulation gives him an advantage, especially by targeting Sentry’s mental instability
- Silver Surfer : Wielding the Power Cosmic, Silver Surfer can manipulate energy and exploit Sentry’s molecular and mental weaknesses, making him a formidable opponent
- Scarlet Witch : With her reality-warping and mind-manipulation abilities, Scarlet Witch can erase or neutralize Sentry’s powers, effectively defeating him without physical combat
- Hulk (World Breaker Hulk) : His raw strength and durability put him among the few who can match or surpass Sentry’s physical power
- Knull : The god of symbiotes, who has crushed entire teams of heroes and even ripped Sentry apart, absorbing his dark side, the Void
- Loki : Especially in his Multiversal God form, Loki can manipulate time and reality on a scale that surpasses Sentry’s, allowing him to erase or outmatch Sentry effortlessly
- Franklin Richards : A reality-warping mutant with near-omnipotent powers, capable of defeating Sentry through sheer cosmic might
- Doctor Doom : His genius intellect and mastery of both science and magic make him a serious threat to Sentry
- Captain Marvel : With cosmic-level powers, she is among those who could contend with or defeat Sentry
Additionally, Wasp has been noted to have defeated a powerful version of Sentry using bioelectric stings and telepathic abilities during a major Marvel event
. In summary, while Sentry is one of Marvel’s most powerful characters, several heroes and villains with cosmic, mystical, or reality-warping abilities have either defeated him or are considered capable of doing so due to their superior control, experience, or power scale
