The characters listed here are only a small portion of the various people written about by Tolkien.

Lexicon of Characters
Aragorn (Strider)
Arwen Evenstar
Beregond
Bilbo Baggins
Boromir
Celeborn
Denethor II
Elendil
Elrond
Éomer
Éowyn
Erkenbrand
Faramir
Frodo Baggins
Galadriel
Gandalf the Grey
Gimli
Gollum
Gríma Wormtongue
Grischnách
Isildur
Legolas
Meriadoc Brandybuck
Peregrin Took
Radagast the Brown
Samwise Gamgee
Saruman the White
Sauron the Great
Théoden
Tom Bombadil
Uglúk