If I had to put Black Panther between Wolverine and Captain America, I would put him a little closer towards Wolverine in the morals department.
How often has he killed or threaten to?
I found it interesting that he was appointed the leader of the Avengers. It seems like everyone shrugs off the fact that Logan and BP have no issues with killing yet they give Frank Castle issues. Okay, I know that was a bad example because Frank is quite extreme.