Venom (Eddie Brock): In the early days of Carnage's rampage, Venom, his symbiotic predecessor, engaged in several intense battles with him. Venom's superior strength and experience eventually allowed him to subdue and defeat Carnage.
Spider-Man (Peter Parker) and Venom (Eddie Brock): In a significant storyline, Spider-Man and Venom reluctantly teamed up to stop Carnage's reign of terror. Their combined efforts proved successful as Spider-Man's agility and strategic thinking, combined with Venom's raw power, managed to defeat Carnage.
Scarlet Spider (Ben Reilly): In some comic book arcs, the Scarlet Spider, a clone of Spider-Man, played a crucial role in defeating Carnage. Ben Reilly's enhanced abilities and connection to Spider-Man's powers enabled him to fight on par with Carnage and eventually emerge victorious.
Captain Universe (Spider-Man): In one specific storyline, Spider-Man became the temporary host of the powerful cosmic entity known as Captain Universe. Imbued with immense cosmic power, Spider-Man confronted Carnage and managed to defeat him in an epic battle.
The Sentry: The Sentry, a powerful superhero with vast abilities, has also been portrayed as defeating Carnage. The Sentry's immense strength, energy manipulation, and control over light and darkness allow him to overpower and subdue Carnage.
These are a few examples of characters who have defeated Carnage in Marvel comics. It's worth noting that the outcomes and details of these battles may vary depending on the specific comic book series or storyline.