Oracle HR should be trained in EEOC regulations and guidelines. https://www.eeoc.gov/eeoc/newsroom/wysk/enforcement_protecti... describes some of them. https://www.eeoc.gov/eeoc/publications/brochure-gender_stere... gives a phone number to call where the EEOC might "explain whether the situation you face is lawful or unlawful." 1-800-669-4000 . I have never tried that number and I don't know the quality of the response.

If you talk with HR, phrases that will catch their attention are "hostile environment" and "discrimination based on sexual orientation."

If you go the HR/EEOC route, know your rights concerning anti-retaliation. (HR may not tell you about them. Their job is to protect the company, and not necessarily give you information beyond the minimum to do that.) Start at https://www.eeoc.gov/laws/types/facts-retal.cfm . In short, complaining about harassment in good faith, even if it eventually is not judged to be harassment, is a protected activity. The company is not allowed to conduct adverse actions against you, nor allow employees to do so.

That doesn't mean things will get better if you go that route. I have no experience with it. I mention it only so you know some about what the law says.