I think Hive account@steemarity would be a great choice.

1. They are not posting too often, if they do it is always for the good cause. (The rewards are all used for real-life charity stuff, not money is lost to officials or a organization)
2. It is a project Hive account@limesoda does with students from Austrian colleges, therefore some great promotion for the whole Blockchain in areas where you would expect many people who possibly could produce high quality stuff.