Thanks for referencing my article! I was the general manager at Trainz for most of the 2000s. I fondly remember those articles; they were one of my favorite projects.
That particular article dealt with the larger engines (4-6-4 and bigger) and not the starter set engines. As far as the starter sets go, I've actually been researching those a bit recently. Many of these sets, particularly the 1970 sets, are extremely difficult to find in excellent or better condition with their boxes. They are quite interesting and are home to a lot of the oddball freight car variations from the early MPC era.
There were 10 catalogued 2-4-2 sets during the MPC era:
1081 Wabash Cannonball (70-72)
1083 Pacemaker (70)
1084 Grand Trunk Western (70)
1183 Silver Star (71-72)
1385 Blue Streak Freight (73-74)
1461 Black Diamond (74-75)
1762 Wabash Cannonball (77)
1962 Wabash Cannonball (79)
1963 Black River Freight (79-81)
1252 Heavy Iron (82-84)
plus who knows how many uncatalogued sets. At least 9 or 10.