So it's not clear that any colleges are particularly fantastic deals that will turn sow's ears into silk purses.
Some universities work particularly hard to foster emotions of solidarity conducive to alumni backscratching (and donating). For example, Princeton (#7 on the list) has about 20,000 people come each year to its class reunion weekend in late May. All reunions are at the same time and new graduates come too. Each class wears a jacket custom-made for the reunion. Last year the first ever 85th-year Princeton Reunions old boy, Malcolm Warnock (class of '25), marched in the annual P-rade.