I broke out the universities separately, because USNW&R separates universities and LACs, and because more people are interested in universities. But you could certainly use the same approach to rank LACs in terms of endowment/student, and that list would have a lot of similarities to conventional rankings.
For example, Williams, Amherst, and Swarthmore have traditionally dominated the top of the USN&WR LAC rankings. Those schools also occupy 3 of the top 4 slots by endowment/student.