I would nominate Ian Fleming. As a travel writer he was great, and his description of the meals that his characters had are superbly written. His action writing was pretty good, too. And his plotting was serviceable, if not intriguing. But his renditions of American speech are painful to read. All the bad guys sound like 1930s gangsters, and most of the rest seem to be parodies of American vocabulary and accents. And the women in his novels are primarily there for James Bond to lust after and almost always sleep with, and to be rescued from the clutches of the bad guys. But I can't think of a single female character that didn't seem to be a plot device.
