Who are your Top 3 underrated characters from the books?

Mine are:

1: Horrace Slughorn (he adds such a different and unique character to what we see in the whole series until book 6 and I absolutely love it! I wish we got to see more teachers from a closer perspective)

2: Sir Nicholas (great character for me, provides useful insight and support for Harry when Sirius dies, helps him out of trouble with Filch, his death day party is just reall cool and he brings a comedic element to the series!)

3: Arthur Weasley (again, comedic element, like all 3 of the characters I chose, but also that fatherly figure to Harry, as well as being the only guy that knows about what's going on that isn't Dumbledore 😂)