I only know of two, and they're Thomas Covenant and Riddick.
In
Thomas Covenant the Unbeliever by Stephen R. Donaldson, the main character is quite despicable, while you can really grow to care about some of the supporting characters. Covenant is a man with leprosy who never really comes to terms with his condition, and often thinks of himself as "outcast" and "unclean." When he's thrown into a strange world called "the Land" in order to save it from Lord Foul, he refuses to believe any of it is real. Then he starts off his adventures with one of the most horrible acts a person can commit and begins to alienate the people around him. Despite his shortcomings, some of the other characters devote their lives to him, and they really make the story worth reading.
Everyone must know Riddick by now, from the movies
Pitch Black and
The Chronicles of Riddick. He even calls himself a killer, has no motivation to save the universe whatsoever, but he seems to grow fond of a few people in particular and decides that he at least wants to help them.
Well, there's my 2c, anyway.
