The Question and Answer section for The Outsiders is a great resource to ask questions, find answers, and discuss the novel.
I think Johnny and Pnyboy are equally heroic. Ponyboy is the first into the church... Johnny makes sure that Ponyboy gets out ahead of him. Both of these acts show courage and selflessness.
The concept of home evolves for Ponyboy but, in the end, home meant the same things as Johnny and Darry felt it was. It was a place to feel belonging to and be loved.
Dally really wanted to keep his family together. Home meant keeping Soda, Ponyboy, and the rest of the gang safe and secure at the house.