The first and most important father in To Kill a Mockingbird is Atticus Finch, the father of the narrator Scout Finch. He is a lawyer in the small town of Maycomb, Alabama who has been engaged to defend Tom Robinson who is accused of raping Miss Ewell. Atticus is an upstanding, kind and thoughtful member of the community raising his children on his own after the death of his wife.
Another famous father in the story is Bob Ewell, the father of Mayella Ewell. He is also a widower but he is considered a dead beat as he spends his welfare money on whiskey and leaves his oldest daughter to try and take care of herself and the other seven children. He threatens to kill Scout at one point and is killed by Boo Radley.
Dolphus Raymond is another father who has children by his black mistress and ignores the social stigma attached to it. He is intelligent and very thoughtful about how to live the life he has chosen in a community that doesn't accept it.
Thank you very much. That helped a lot! :)