The apostle Paul, best known for his 13 letters in the New Testament, talked about the Dispensationalist rapture/second coming of Christ scenario, long before Tim or Russell.
You are incorrect, but it’s past midnight and I don’t feel like rehashing the reasons why for the 78th time. Pax vobiscum.
While the second coming has been traditional Christian doctrine for almost 2,000 years, dispensationalism was only invented or discovered (depending on one's view) in the 19th Century. Most Christians through the ages believed that the Beast of Revelation was Nero. LaHaye and others claim to be literalists but they stretch the Bible to fit their ideas.