I like the soups at Piatto Pronto in Andersonville. I didn't have to doctor up the minestrone at all, but I did have some kale so I tore some tiny bits in to add some green goodness.
It isn't American at all, but I am a huge freaky fan of the very peppery Lebanese Lentil Soup at Taste of Lebanon, which is a bargain (especially if you eat in) at less than 3 bucks for a large bowl.
hope this helps!
ps just to plug it: Soup & Bread started this week, it's always on Wednesdays at 5:30 pm at the Hideout and it's free but a donation is suggested. 5-6 different homemade soups are served from crock pots by those that made them. I served my Matzoh Ball soup on Wednesday and it was gone in 60 seconds. So come early and fill your bowl often.
bjt
"eating is an agricultural act" wendell berry