What are some juicy roles in the play, To Kill a Mockingbird?

While the book and the movie for To Kill a Mockingbird are very easy to find, I’m having difficulty getting a hold of the play to read. Buying it online would take too long.

So, I’m looking for someone who has read the play to give an idea of male roles that have a lot of stage time for middle-aged men. Obviously, Atticus is the alpha role. Are there any other roles that get a lot of stage time? I know that Bob Ewell is pretty major in the movie, but how much does he do on stage?

I’m looking just for roles for middle-aged men, but I welcome all comments, since someone else may have a similar question for another actor. No sense in keeping it all to myself.