Templeton

Templeton is a gluttonous rat and and the anti-hero of Charlotte's Web. He is a greedy, gluttonous, lazy, and rather selfish rat who helps Charlotte and Wilbur only when offered food. He is always trying to get Wilbur into trouble, while Charlotte is trying to keep the pig from becoming bacon. He is voiced by the late Paul Lynde in the 1973 Animated film, Charlie Adler in the 2003 Direct to video sequel and Steve Buscemi in the 2006 live action film.

Personality
Templeton is a rat who always looks out for himself. He is greedy and lazy. It's also a continued theme in at least the animated movie that Templeton repeatedly asks this question "What's in it for me?", and is repeatedly answered with very strong incentives. He only agreed to help Wilbur because if the pig is slaughtered, then that would also mean that the pig's trough would remain empty and therefore Templeton would also die. He is also shown to be quite clever as shown in the live action version where he outsmarted two pesky crows twice into getting into humiliating situations (causing them to crash into some sand and pink paint; trapping them in a scarecrow machine).

Despite his negative traits, Templeton does have a very soft side buried quite deeply in his gluttonous body. As he warmly smiled as the dying Charlotte thanked him for his help. He also genuinely mourned her death.