Darigold
Whenever I fail to bring a lunch I walk to the Albertson's up the street and grab stuff there. I mention Albertson's by name, because they're the only place I've consistently seen Darigold yogurt.
I likes me a good yogurt, and Darigold is the only brand I've seen that doesn't have high fructose corn syrup in it (except for expensive specialty brands).
There may be others out there, but Darigold is cheap, HFCS free and, most importantly, tasty.