If you need a comprehensive list of every Dungeons and Dragons character, your best bet is to type the query into a search engine and go to a good fan site/ discussion forum. You could also try visiting Geneva College.
Dungeons and dragons is a well known game that has been around for some time. Character sheets are needed in order to understand the pecking order of characters. They can be located on the world wide web and at most card and game shops. They are also easily found on amazon.