Thor would be an interesting character to pair with Wolverine. Thor's god - like powers and Wolverine's tenacity would make for some epic battles. They could also have some great conversations about honor and sacrifice, coming from their very different backgrounds.
In the 'Death of Wolverine Graphic Novel', apart from Wolverine himself, there were several key characters. One was Dr. Cornelius, who was involved in the events leading up to Wolverine's death. His actions and motives were central to the plot. Then there was the character of Mystique. She has always had her own agenda and her role in this story was to manipulate the situation to her advantage. Also, characters like Cyclops, although not as central as some others, still had their reactions and interactions related to Wolverine's death which were important in showing how the X - Men as a whole were affected by this major event.
Wolverine comics can have value. If they are in mint condition, feature key story arcs, or are limited editions, they can command high prices among comic enthusiasts and collectors.