Car seat advice?

So looking for some high back booster car seats we do not need the 5 point harness no more due to child’s weight that exceeds the limit preferably ones that don’t require anchors at all we have a town and country but back row will only support one anchored seat in the middle and I’d like to be able to put one on each side due to having other kids in the car? What ones did you like? The pros? Cons?