Batman and Ka-Zar

Ka-Zar was basically a Tarzan Knock of at first glance, but the twist of his locale, the Savage Land - set in the present day with Dinosaurs alongside the usual jungle denizens - was enough to make him stand out. I liked that he could appear alongside all of the more traditional Marvel heroes one minute, and have a lone jungle story in the next. His guest appearances were my main exposure to his adventures, I loved his tales with the X-Men and Spider-Man.