I can't stand artificially sweetened yogurt. I do like Stonyfield Farms nonfat French vanilla, which is sweetened with (organic!) sugar. It's one of my few indulgences these days. I usually add chia or flax seeds and fruit, if I have any that's compatible (e.g., strawberries yes, oranges no).
A healthier option would be adding fruit/vanilla and agave nectar to unsweetened yogurt, but it would be more trouble.