What fuel type? If you’re open for electric there’s the Enyaq that has a cavernlus boot and huge rear room. With a front seat fully back I’m 6 foot 1 and I can still sit in the back without touching the seat in front. I have 2 teenage boys 18 and 16 and they love the back there’s so much room.
There’s also the Vauxhall combo xl 7 seater it has a lower range but again it’s cavernlus plus the rear has sliding doors.
I’m sure there are some great petrol cars out there I’ll leave those for others to comment on. Do you have any other needs too?