Repugnant behavior on his part but I don't think it rises to a level that the OP has to inform others. Many people make drunken overtures without it rising to the level of "sexual assault."
I would make it clear to the man that his advances were unwelcome and that if it happens again you will inform your husband, his wife and your mutual employer. I have a feeling the matter won't be repeated. He's probably kicking himself and cringing.
I had a work colleague (him age 42, me age 24) invite me to dinner on pretext of discussing a work situation and (not drunk) proceed to inform me that he had moved out from his wife, the it was no longer necessary for us to hide our passionate love for one another behind vague workplace banter and that he just knew I was going to make a great stepmother to his daughters (who were only about five or six years younger than I.) Talk about your WTF moment. WHERE did all of that come from? He (a respected computer expert working for major high-tech firm) was delusional. I hurriedly left the restaurant.
Even at that age I was wise enough to realize it was midlife crisis time for him and that any young woman would have done. He whined and bothered me at home with phone calls for a couple of days until I told him in no uncertain terms that I would get the VP of HR on the phone right that minute unless he left me alone for good. Given that I was subordinate to his position in the company, he would have been fired the next day, and we both knew it as another person had just lost his job in similar circumstances.
Also said that I would provide his wife with recordings from my answering machine, (this was years ago) etc. to use in divorce proceedings, and that my boyfriend could corroborate hearing the unwelcome phone calls coming in. He dropped me like a hot potato. Eventually got back with his wife and they still are together. I am glad I didn't act rashly and make a spectacle of the whole thing when a few firm private words sufficed. Had I been married at the time I would have acted the same.
BUT, OP, he gets one chance to behave and after that, yes, go with the more nuclear option.