In an extensive report released on Friday, the committee detailed that several female staff members complained to Mr. Meadows that Mr. West routinely put his hands on their backs and shoulders, pulled their hair, and stared down their blouses and up their skirts. He also made inappropriate comments about their physical appearances, witnesses said, telling one woman that he could not believe “your husband lets you out” looking “that way.”

Frustration in the office came to a head in October 2014 when a group of employees met with Mr. Meadows’s deputy chief of staff at the time to discuss the inappropriate conduct. The congressman held a meeting with his staff in January and said he would “take care of it,” multiple witnesses told investigators. He then removed Mr. West from his Washington office and changed his title to “senior adviser.”

Problems continued when Mr. West unexpectedly showed up at Mr. Meadows’s district office in North Carolina and was asked by staff members not to return. Mr. Meadows later announced that Mr. West would leave the office entirely.

But Mr. West continued to be compensated at the same rate, a decision Mr. Meadows made “for the sake of a smooth transition,” he wrote in a 2015 letter submitted to the Office of Congressional Ethics, noting that “Kenny did continue to perform some services and was paid through August 2015.”

Both Mr. Meadows and Mr. West refused to cooperate with the office’s review.

The committee also released a report on Friday reproving Representative Ruben Kihuen, Democrat of Nevada. Mr. Kihuen, a freshman lawmaker, did not seek re-election after Buzzfeed News reported that he had repeatedly harassed and made sexual advances toward his finance director. Two other women, one an aide, the other a lobbyist, testified before the committee that Mr. Kihuen made repeated unwanted physical and verbal advances toward them and, in one case, suggested “through the use of emojis” that they make a sex tape together.