Books With the Greatest Characters

Here is a list of books that I believe have some of the greatest characters of all time, from small secondaries to amazing mains! For making us hate them, and for making us love them. Full list of characters shall be included here:
House Atredies - Baron Harkonnen
Watership Down - Hazel, Blackavar, Fiver
The Hitch-Hiker's Guide to the Galaxy: A trilogy in Four Parts - Ford Prefect
Regeneration - Siegfried Sassoon
The Eye in the Door - Billy Prior
To Kill a Mockingbird - Boo Radley, Atticus Finch
The Millenium Cycle - Lisbeth Salander
One Flew Over the Cuckoo's Nest - Billy Bibbit
The Iliad - Hector
Frankenstein - The Monster
David Copperfield - Steerforth
Harry Potter Series - Sirius Black
Wuthering Heights - Heathcliff
Romeo and Juliet - Mercutio
The Lord of the Rings - Gollum
A Song of Ice and Fire - Arya Stark
Memoirs of a Geisha - Hatsumomo
Wise Children - Peregrine Hazard
Danny Champion of the World - William