To seat 6 adults with plenary leg room for all And still have a decent boot I would be looking at a transit crew van.
There are plenty of bad ones about, but with careful research and a keen eye good ones are out there to be found.
Seat , Peugeot , Volvo and Ford all do the seven seat people carrier thing as well , and the older petrol ones are as cheap as chips .
Not fast or trendy , but thats not what you buy a 7 seat anything for ,,, personally I
''Never buy anything with more seats than Cylinders''
but Im a simple sort that just likes to drive cars , and not fix them , unless Im getting an hourly rate for it , I certainly dont like fixing my own.