Pack,
FYI, there are over 126,000 different potential plans in my database right now
Unfortunately, my coverage checker isn't finished yet, so I have to rely on cellreception.com. According to them, in Muckwango there isn't much difference between the carriers. AT&T and Verizon are just slightly better than T-Mobile and Sprint. In Decatur, T-Mobile is by far the best, then Sprint, then Verizon, and AT&T is bringing up the rear. Literally the exact opposite of at your house, lol. Ultimately, none of them will be perfect, but they should probably all give about the same experience.
So, your absolute cheapest would be with Zact. You'd be looking at $73.78 total, plus taxes. The downside with them is that they have a very limited phone selection. Sprint's network, LTE access, free roaming, and if your dumb phone is for a kid, they have parental controls.
Next best would be Consumer Cellular (on AT&T's network). You'd be looking at $90. No LTE, but its HSPA+, probably 6 MBps. Free roaming too. Its GSM, so any unlocked GSM phones work.
Next after that is Ting, coming in @ $93.
After that, prices jump to $125, so its probably one of these three for you.