I think I've met two in my life. One was my history and literature professor. I was very impressed after the first couple of classes because this guy was a perfect teacher. He was not very emotional(but wasn't cold either, he laughed a lot), he was fair and rewarded had work and creativity, very knowledgeable about his subjects and always added something extra to all his classes. Also his ability to remember exactly what someone had said in class a week ago made me think he had to be like me. I have an amazing memory for spoken words. I can tell you what you said to me two weeks ago in exact word order you said it. He always arrived on time(not early, not late) and knew how to establish authority even though he was just starting to teach and we were his first class, and a problematic one I should add. He also knew all our names and surnames after 4-5 classes. I think all ENTJs have an amazing ability to store a huge number of facts in our head, especially work related facts.
The second one was a guy in my class who had excellent grades like me. He might have been an ESTJ though. Because he wasn't very mature. He had a huge ego and liked to argue with teachers, but he argued destructively, which is something we ENTJs hate to do. All my arguments are productive. If I see that the other person doesn't know how to argue I'll back off, because I hate destructive arguments. I never formed a closer relationship with him because all the conversation with him would turn into a competition, not only with me, but with everyone. He was smart but his immaturity was a big turnoff to most people. He's now into med school, I hope he got more mature as he got older.
Oh, and there was a girl in my class who got ENTJ on the test but I always thought she was an ISTJ. I can notice when someone is N.