I agree with you. Though a university, Wake is arguably the most LAC-like of any of the national universities and has a heavy emphasis on undergrads, not just a small student body (4800 undergrads). It has fewer large classes than any of the national universities except Yeshiva, as I recall – in fact, it has fewer classes with 50+ students than some respected LACs like Williams and Pomona. Unfortunately, Wake is also the least known of the national universities on these forums, much like its fellow NC school Davidson.
I’d add Tulsa to the list, which has a business school and the extra perk of being fairly generous with merit aid, but I think most of the obvious suspects have already been recommended.
Colgate posters have spoken highly of the econ program there over the years, so it may be an option as well.