Unfortunately there are no "secret trucks" that ticks off all your boxes, but nobody else knows about so you can snap it up cheap.
That's really what you're looking for us to tell you about here... If only there were such a thing, but every corner's been thoroughly searched, and there are no such secret special trucks, no "dogs" on the market that don't deserve to be.
All you can do is shop, and keep shopping until you find the right deal on something that meets your needs. Many 1500 series trucks will pull your trailer, but if you're filling those three rows in the old Excursion with growing kids, a 1500 pickup isn't going to have the seating capacity you need.
Really in this day and age there is no direct replacement for an Excursion. The market for "3/4 ton" SUVs was such that all the manufacturers dropped them. Passenger capacity and payload capacity has been relegated to 1 ton vans, but vans aren't "cool" so very few people consider them a viable option.