I'm not entirely sure without more context, but he is likely the central figure in this story. He might be someone who has had extraordinary experiences in facing life's challenges directly.
I'm not sure specifically what the 'big sal story' is. It could be a personal story about someone named Sal, or it might be a local or family - related story. Without more context, it's difficult to tell.
One of the best Hal Jordan stories is 'Emerald Twilight'. It shows a dark turn in Hal's life as he succumbs to the power of Parallax. Another great one is 'Rebirth' which rejuvenates his character and brings back his heroic essence. Also, 'Secret Origin' is a classic that delves into his origin story in an engaging way.
Shallow Hal is not based on a true story. It's a creation of the filmmakers' imagination, designed to entertain and offer a particular message through a fictional narrative.
The arcs where the Hulk has to face his inner demons are also great Sal Buscema Hulk stories. He has a unique way of showing the Hulk's internal struggle, not just his physical battles. You can really feel the Hulk's pain and his fight to control himself or just let loose, and it's all enhanced by Buscema's art style.