I'm surprised of all accents you haven't tried a southern or a New York one. I could be a very good judge of either of those two.
Ok, so I listened to some samples from Kentucky, Georgia, and New York, and decided to try. It seems like the accent in Kentucky is much milder and more similar to my own accent than the accent in Georgia. I also did a NY accent after listening to Rhoda.
New York
Kentucky Southern
Georgia Southern