Aside from the many other issues with ranking (the importance of the SES of the students, word of mouth reputation among admins, etc), ranking LACs along with research universities is comparing the metaphorical potatoes and bananas.
Aside from size, LACs, research universities, teaching universities, directionals, etc, each have a very different mission. The main and almost only mission of a LAC is teaching, while a research university is half teaching, half research, except if it also has a medical school, in which case, medical treatment is part of the mission. All pubic universities have outreach as part of their mission, and land grant universities all have agricultural extensions as part of their mission, as well as things like Geological and Natural History surveys. And so forth, and so on.
The Forbes ranking has a couple of additional issues, among them, the fact that they rank based on two very skewed data sets for salary information (Payscale and IPEDS), and, for student satisfaction, they rely on Niche. Also, for āAmerican Leadersā they only look at business and political leaders, ignoring any other category.
While the last is reasonable, because it is Forbes, and those are the people who read Forbes, the first two factors, which account for 40% of the rank, are highly unreliable, meaning that the entire ranking system is unreliable.