I do not know that much about Harris; but Gothard certainly had his problems. I would say LaHay was equally bad. But the fault was not with them but a byproduct of the gentilization of the church in the 2nd century. Cut off from the Jewish understanding of the Jewish authors of scripture, the early church fathers intrepreted and twisted the prohibitions on lust and premarital sex into a worship of virginity bordering on idolatry. Some wrote that even married sex was so abhorant to God that the Holy Spirit had to leave the house when a husband and wife were so occupied. Jerome wrote that the ONLY reason God allowed married sex was to make more virgins for the church.
So what any of those contemporary guys wrote, it was not as bad as the early church fathers.