OK, I'll throw my hat into the ring.....
Firstly, I will agree with the others about the Jeep, I love mine..............................but,
They are only available as a 5 seater............there is no 7 seat option at all!!
That really discounts it for you at the moment.
A couple of other things that have been mentioned but as yet not sure if you've answered or not is, do you intend getting far off the beaten track at all?
I ask because this will dictate to a certain extent whether AWD or 4WD.
If you don't intend getting too far off the blacktop then I would highly recommend an AWD diesel Territory.
If you do intend going further off the blacktop then I would highly recommend a diesel Pajero.
I've had both, but in petrol form.
They are both available in 7 seats and the 3rd row folds away into the floor completely when not in use, unlike some others. The Terri has a 2700kg towing capacity and the Pajero 3000kg.
Another thing to consider is how long do you intend to keep this car.
Your step-daughter is now 16 and in less than 2 years she will most likely have her own car and won't want to travel with you, negating the need for the 7 seats.
Good luck in your quest.
Matty