dweitz -- I'm with AspirEDU, a partner of Canvas, and our Dropout Detective solution can give you a lot of what you're looking for...though maybe in not quite as condensed a way.
First of all, we allow the school to build dashboards of students, grouped any way you want. So the football team may be a dashboard or all students assigned to one advisor might be another. When you click on a student's name, you'll see a list of all courses he/she is taking, how many missing assignments they have in each course and by clicking on a "show" button, you can see which assignments are missing. I don't have one single report that will give you the names of all missing assignments for a group of students. See the screen shot below and feel free to reach out to me if I can help further:

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