who are the Most Underrated, Overrated, Under utilized, Over utilized Characters from HP Series?

According to me -

Underrated - 1. Peter Pettigrew(yes you heard me right, even though his intention was always to save his ass, he was the most useful Death Eater of Voldemort, helped him to Locate Potters, Helped him to Resurrect, best Animagus to hide and gain useful information etc.
2. Neville Longbottom - Fans Associate his growth with his change of wand, but I think he is a late bloomer, was in lot of pressure with constant comparisons with his Father, but once he got his confidence thanks to DA, he showed why he is a true Gryffindor.

Overrated - 1. Luna Lovegood - I like her uniqueness too but other than that I don't think she brings much to the table. (sorry Luna I love you)
2. Severus Snape - Alan Richman saved this character from hate similar to Umbridge.

Under utilized - 1. Nymphadora Tonks - Metamorphmagus skills, can change her appearance at will, trained Auror, could have done serious damage to enemies, but was reduced to Lovesick puppy.
2. Charlie Weasley - He is supposdly works with Dragons, in series we know that he comes pretty late to the Final fight, I personally would have liked to see him from that Bill weasley.

Over utilized - 1.Draco Malfoy, man his whining, Racist, Bigoted character got on my nerves a few times, another character with not much impact but supposed arch-nemesis of Harry Potter.(Sorry Tom Felton Fans).
2. Argus Filch - His threats to kids due to his jealously of being a squib got on my nerves.

What about you guys?