Does your company consider Louisville in the Southeast? It's Upper Midwest for my organization. Anyhow, I like it here. Summer weather isn't as extreme on the humidity side but winter can have some cold days.
Downside is so damn far from the ocean. Closest beach is nine hours. I'd prefer to be a bit closer.
Nashville would be a better mild climate choice and it's only six hours to the beach. Still not the crap hot summer that you'll have in Georgia.