* Heck Tate, the sheriff: He represents the law and order of Maycomb, Alabama. While he's a good man, he's also deeply entrenched in the town's racial prejudices. He ultimately chooses to uphold the status quo and protect the white community, even if it means compromising justice. He supports the established order of Maycomb, even when it's morally wrong.
* Mr. Underwood, the publisher: He's a complex and morally ambiguous character. He's known for his strong opinions and independent streak, but he also has a deep understanding of the racial tensions in Maycomb. He is sympathetic to Tom Robinson's plight and actively supports him, even though he's afraid of the consequences of his actions. Mr. Underwood supports justice and standing up against racial injustice, even if it means going against the prevailing opinion of Maycomb.
It's important to remember that these characters are not simple good guys and bad guys. They are flawed individuals who make difficult choices within the context of their time and place.