The Higgs boson discovery papers had some interesting history concerning the embargo policies as far as I heard, but I don't know details. Both papers appeared in PRL B, while Nature and Science were certainly interested in those extremely influential papers. Reporting it at a conference without getting media attention was impossible, of course.
The ATLAS and CMS Higgs results were published back-to-back in PLB. There was also a set of three papers (An overview, and a summary of the ATLAS and CMS results) in Science, which were written at a different level: intended for scientists who are not physicists. These were written at Science's request,
Nature was somewhat annoyed, bur the position of the experiments was that PLB was there for us when we were publishing papers that were "dull but important".