Might as well throw my 40% of a nickel in (this could go on for a while)...
While Google is a tremendous search engine, it doesn't know squat about L&HR prototypes. That IHC 2-8-0 has as much to do with the L&HR as a streamlined passenger train; it has the right number of wheels under the boiler and cylinders, and that's about it. It looks nothing like any consolidation they had. The decals from Raritan Bay Hobbies are, I believe, reproductions of the old Herald King/Miller Advertising 10 class caboose decals.
As for the new Atlas C-420, there was discussion about it in a previous thread; technically it is only accurate for the 21 after a rebuild in 1966. I haven't seen one yet, but from the website pictures, it looks like the blue they used is a little on the dark side; it's hard to tell from just one photo (they were given color input from a few people, including me; no idea if they used it).
A few years back Atlas also released an L&HR RS-3. Overall good, but the herald on the cab side looked oversize; also, it doesn't have the correct 'frog-eye' numberboards (more about that later). I don't have one, but I've heard that the Atlas cab is more that a foot out of position; not good. I've heard that it is because the Atlas tooling was based on an incorrect drawing in Mainline Modeler magazine.
I have one of the old Stewart RS-3's, and two of the old cast-metal Hobbytown powered models. The Hobbytowns weigh almost as much as a house, and will pull a house. Super slow speed gearing, especially for its age; it uses a DC-70 open frame motor, and the drive uses no worm gear. The design dates to around 1950. And Rich, the stack on the Hobbytown is correct for the as-delivered RS-3's; they received the cross-mounted stacks when they were upgraded to the newer water-cooled turbocharger (somewhere around '55).
As for the distinctive numberboards, Detail Associates used to make them, but they required hollowing out a notch on the hood corners. Not an easy task on the Hobbbytown's hard zamak hood castings. Short Line Products makes the boards, hollowed out on the back to fit the corner contour (the bottom of the boards should be 9 feet above the walkway).
For steam motive power, any USRA light mikado could be used for the 80 class, at least for the as-delivered version. Broadway Limited offered their version correctly lettered for L&HR. Over the years the road added and changed details and piping (most visibly, adding a Worthington feedwater heater and a second cross-compound air pump).
Years ago, Bachman offered a plastic Reading I-10sb 2-8-0. The tender is wrong, but the locomotive could be a stand-in for a 90 class. With some detailing (mainly a fatter boiler, and the right appliances and tender), a decent model can be done. In roughly the same time frame, Lee Town Models produced a set of detail parts to convert a contemporary Mantua 2-8-0 into a 90 class.
For the 10 class 4-8-2's, years ago AHM imported a brass B&M R1-d (there may have been another brass import in the 80's; not sure). I have one of the AHM's. Since the 10 class was built using plans of the R1-d, it's a good stand-in, though there are minor detail differences.
Again years ago (early 60's?) Gem imported a brass Reading I-6; this was very close to the 50 and 60 class camelback 2-8-0's (three of them lasted until the end of steam).
That's about it, off the top of my head, for motive power.
Rolling stock? At least two brass versions of the 10 class cabooses have been imported over the years, and there is the Branchline conversion kit for the Life-Like. Nothing has been done for the earlier 90 class (the 'long' cabooses converted from milk cars), or the four-wheel 70 and 80 class bobbers (but- stay tuned for something on the 90 class, he said enigmatically
For work train equipment, there was the Ambroid craftsman kit for the flanger 105 (former O&W R-4, bought at the O&W bankruptcy sale). Good model, and accurate- it still shows up on Ebay.
Gould (now Tichy) put out a 120 ton steam wrecking crane that is very close to the L&HR's 100 ton crane (minor differences in boom rigging and pulley frame pivot point location). I have one, and it's a lot closer than anything else on the market.
As for freight cars, as mentioned there wasn't much on the prototype to choose from, and with one exception, none have been produced.
The exception is from a couple of years back, a joint venture of Roller Bearing Models and Shortline Products. It's a flat-cast resin kit of the 2000 class zinc ore hoppers. Decidedly a craftsman kit, but beautiful.
Nothing has been done for the earlier classes of zinc cars (if you see anything in a covered hopper lettered L&HR, it ain't real).
There were two large (for the L&HR) classes of boxcars, dating to the turn of the century. The 2000 class (yeah, same series as the last zinc hoppers, but the boxcars were LONG gone by then) were all wood, truss-rod double sheathed cars. Most if not all were gone by shortly after WW I. Slightly newer were the steel-underframe 2100 class.
I made reasonable stand-ins for both using the old Roundhouse 39' double sheathed boxcars- both truss rod and steel underframe. I used long-discontinued Walthers L&HR freight decal sets that I'd hoarded in the early 70's.
A handful of these were converted to work train service (painted gray) sometime around WW II.
There were also the few flatcars and low-side gons; again, no accurate models have been produced.
There's more (not much- passenger and milk, both gone before WW II), but I've gone on long enough...
