Streamlined Commodore Vanderbilt scale
NYC Streamlined Mercury loco and scale length passenger cars
C&O L1 scale
RDC's scale including length
scale length Amfleet and viewliners with kinetic coupling
Susquehanna E8's
NJTransit scale length bilevels.
Charger locomotives
CalTrains "Baby bullet" locomotives
New York and Greenwood Lake Geep
Delaware Coast Line (not sure if it was a C420 or an RS something)
South Shore MU's
Metra scale bilevel electrics
Center beam lumber flats scale length with proper truck placement and kinetic couplers
Open auto racks scale length with proper truck placement and kinetic couplers
tourist railroad gondolas with bench seating and steps at both ends to the adjoining passenger cars.
Dining cars without sounds
Hoppers used as buffer cars.
Ringling Bros Circus train offer one or two scale cars each year.
That's enough for now.