Some artists flit back and forth between companies and others spend most if not all of their careers in one spot. Inker Frank Giacoia, for example, worked at Marvel and DC. Robert Kanigher, on the other hand, pretty much never left DC. Ditto artist Kurt Scheaffenberger, who popped up at several publishers before settling in at Fawcett and, after their demise, DC (and ACG but that's another story). Thus, what we have here is more or less a DC romance story...from Marvel!