There seems to be a (unofficial) couple of subtypes of narcissism, so called hypervigilant, covert and inverted narcissism. Not sure if they are the same. To qualify for NPD you should meet 5 out of 9 criteria so you could have NPD without grandiosity.

I have been into (western tibetan) buddhism for a while. Imho lots of those "teachers" are inverted narcissists, also catholic priests and the same could be in other religions. If you doubt or criticize or don't follow their rituals somehow, some of them get mad. The same with some therapists. Once we were talking in a group session about helping others and that I get satisfaction from that. At the same time I asked myself: do I help others to feel good or do I help them to make them feel better and I said that "you therapists" make money because there are people suffering. She looked at me in an angry way and neglected me the rest of the session.

My personal opinion is that therapists (and also laymen) lable others to quickly as being a narcissist. If you watch carefully many people show traits of some personality disorder. As long as they function in life and don't really mistreat others, I don't think they have NPD.