Midd and Hamilton for Econ and Wall Street ties – probably, yes. Probably also for most humanities and social sciences.
But for STEM, I imagine Lafayette is the strongest of the three overall. They do offer Engineering, which Midd and Hamilton lack.
Overall, there is probably more varied program strength at Midd and Hamilton. But i’m almost certain Lafayette holds its own academically. Looking at their CDS, they certainly have plenty of smart kids.
And academic ranking aside, plenty of people on this site have given the Lafayette campus rave reviews. All you need to do is peruse the “tours/visits results” thread – it’s called something like “schools your kids liked and hated on visits” – which has been one of the most popular threads on this site.
If Midd is Penn, Hamilton is Northwestern and Lafayette is, oh, Tufts or Boston College… who’s to say some kids won’t find a better fit at BC/Tufts than they would at Penn or Northwestern? If they are following their fit preferences and taking cost into account properly, they can’t make a wrong choice.