15THE HULK WAGES WAR
We just saw the kind of large-scale damage that one rogue Hulk can do in Thor: Ragnarok. In "World War Hulk", Hulk is sent to space, where he conquers a planet and has a wife and son. When his wife and son are killed, Hulk seeks revenge on everyone who has
ever hurt him. He mangles Black Bolt for trying to stop him, and sets his sights on destroying all of New York City. Even a Hulkbuster Iron Man, an ax-handed Doctor Strange, and all of the Fantastic Four can't stop him.
The Hulk sets his friends up in a death arena and makes them fight each other, but he is finally arrested and trapped in a coma, in a prison beneath the Earth's crust. The Hulk might be violent, but seeing him try to murder all his friends would not make for a happy movie.