Ideas for Freight Cars & locos

today i was browsing through my Walthers HO scale Refrence book (2009) and then it dawned on me, why don't i take a look at some freightcars and locos that we don't have in RW that would make an impact!?!
Freight:
well here are some that i think would be a major contribution:
Thrall 56' All-Door Boxcar
40' Ortner 100-Ton Open Aggregate Hopper
Trinity RD-4 Coal Hoppers
Difco Dump Car
63' Pulpwood Flat Car
GSC 4-Axle, 90-Ton Depressed-Center Flatcar
Flexi-Van Flatcar
40' 16,000-Gallon Funnel-Flow Tankcar
40' PS-3 Stock Cars
Thrall Articulated Auto Carrier
Pacific Far & Foundry 57' Mechanical Reefer R-70-15
Steam Generator Car
Locos:
USRA Heavy 2-10-2
Alco C-424
GE 44-Tonner Switcher
ATSF 4-8-4
SP AC4/5 Cab-Forward
SD9 & SD7
SD50
EMD BL-2
Freight:
well here are some that i think would be a major contribution:
Thrall 56' All-Door Boxcar
40' Ortner 100-Ton Open Aggregate Hopper
Trinity RD-4 Coal Hoppers
Difco Dump Car
63' Pulpwood Flat Car
GSC 4-Axle, 90-Ton Depressed-Center Flatcar
Flexi-Van Flatcar
40' 16,000-Gallon Funnel-Flow Tankcar
40' PS-3 Stock Cars
Thrall Articulated Auto Carrier
Pacific Far & Foundry 57' Mechanical Reefer R-70-15
Steam Generator Car
Locos:
USRA Heavy 2-10-2
Alco C-424
GE 44-Tonner Switcher
ATSF 4-8-4
SP AC4/5 Cab-Forward
SD9 & SD7
SD50
EMD BL-2