I don't have a single top pick, but I have a few examples that are high on the list:
1. An INTP girl who became my good friend during my senior year of school. We would talk about weird shit we found on the internet, life philosophies, Pokemon, video games, and all sorts of stuff. The thing I liked the most about her was her smarts, since she didn't lack any. I remember we had art class together and I would always be jealous of her skills, and I would tell her that and she'd be like "oh I know, I think I might be Picasso's reincarnation" or something like that. Definitely one of the most interesting/fun people I've ever met.
2. My 7th grade homeroom/history teacher, which I'm fairly certain was an ENFJ too. This guy just had a way of captivating the class, and we were not an easy class to deal with that's for sure. There was this one kid who has been a rebel ever since grade school, he would always get in fights and he never listened to teachers, but my teacher always managed to get him under control somehow. It's almost like this kid never had any respect for teachers, since they never listened to him, but this specific teacher went head to head with him, and they gained mutual respect over time. One way or another, everybody in class loved that guy, and his way of teaching, which in turn caused nearly the whole class to do well on his tests. He's a bit like a life inspiration for me.
3. An INFJ dorm mate I had in my boarding school. I always found this guy to be extremely peculiar, since he was very critical all the time, but he cared very deeply about his friends. A lot of times him and I would get into arguments about dorm-related issues, and it always seemed like we had a certain agreement about what to do, but never about how to do it. For example, if we ran out of cleaning materials and someone had to go bring some from the maintenance building, I would always be happy to do it, until it got to the point where I was doing it every time, whereas he would do it one time, and then next time he would say "but I did it last time," and even though we both agreed that someone had to go bring it, and neither of us really cared about going, he just had this attitude of wanting to help, but only on his terms. Which, I suppose could be attributed to his dominant Ni vs. my dominant Fe, sort of, I dunno. I just found him to be very interesting, since it always felt like we were on the same page in theory, but never in practice.