Hulk had a pretty high body count in TIH. Not only did he kill the one soldier in the factory, but he also killed or seriously injured all but one of the thugs who chased Banner and quite probably every other soldier besides Blonsky. It's impossible to imagine that all of them survived being thrown through walls and crushed by machinery.
When they got to Culver University Hulk had to have killed a number of the soldiers who attacked him on the ground, as well as the entire crew of the attack helicopter he brought down. He picked up vehicles with soldiers inside and battered them to pieces, and jumped onto the trucks hitting him with sound waves and destroyed them with soldiers inside. Hulk attempted to kill Blonsky when he kicked him into a tree. The only reason he didn't kill Blonsky outright is because of Blonsky's enhancements. Hulk certainly didn't know that Blonsky would survive that blow.
In addition to all of the on-screen kills, Ross mentioned that Hulk killed several people when he was on the run, including civilians. He may have killed one or more scientists when he first hulked-out, too.So far from being above killing, Hulk actually deliberately killed or injured many people, and some of those were individuals he had no excuse for killing.