Another man, also high ranking and also with no actual power me, kept looking for excuses to touch me in a "punch you in the shoulder" sort of expression of affection. It was clear to me it was an expression of sexual interest. He was a married man. I left the company not long after this began. Because I did not work directly with him and only knew him socially as someone I talked with in the cafeteria, I saw no reason to report it. Had it continued or escalated or had circumstances changed such that I did need to actually work with him, I was clear this was something I might eventually have to raise as a concern.
Women almost never initiate touching with men. It is well established this is a sex based "male privilege." Men tend to take it for granted that no woman is allowed to touch them without permission. I am clear that a man touching me without permission -- a married man, doing nothing to in any way benefit me and intentionally avoiding being helpful so as to not be seen as being sweet on me -- was violating my boundaries.
Another man -- well, it is a long story. I knew him socially through chit chat in the cafeteria. Purely by chance, he called me "doll" and "babe" the week before I learned he was slated to become my new boss. At the time, he did not know my name and I did not know he was married. The first incident occurred away from work and I was clear he called me "doll" in part because he did not know my name. It wasn't really offensive or bad behavior, but I discussed the matter with my current boss and got myself quietly moved to another team. I then walked on egg shells around him for 24 months until he was finally fired. One rumor was that he had been fired for sexual harassment. Another was that he had been fired for an illicit affair with a lower ranking employee. I made sure to side step trouble with him. I did so successfully, so there was no smoking gun. His actions were nothing to report to HR but I was clear I did not want him in charge of me. After he was fired, a former team mate who did stay on the team -- a very attractive woman -- confided in me that he piled work on her, made inappropriate remarks and gave her so-so reviews, probably as punishment for not be interested in his attentions. She had asked me earlier why I got moved and I had not divulged the real reason. I felt bad when I learned what he had been doing to her, none of which was blatant enough for her to go to HR. Like me, she was relieved when he was fired.
Those are the most obvious things I can think of off the top of my head and I have a deadline to meet today, so that shall have to do for now.