A few years ago when I was looking for a used vehicle one or two years old, I found Edmunds.com and ConsumerReports.org to be quite useful in researching features, safety, mileage, comfort, etc.
Edmunds is free, while Consumer Reports requires membership.
The older the vehicle is, the more likely it is to deviate from the baseline, and the less useful a review of a model is.
For the last several years the Honda Odyssey and the Toyota Sienna have taken turns as the best and close-second-best minivans.
If either one of these is an option, I’d consider it first.