Regarding the Mazda CX-5, I have the 2L Auto Sports Nav+ petrol.
I am 6’3 and have had 3 lower spine ops and replacement hip amongst many other problems and I find the seat to be one of the most comfortable for driving off the many cars I’ve owned.
‘The Seat is electrically adjustable with lumbar support so is easy to find the most comfortable position with memory to store it.
If you are only doing about 15k a year, I would consider petrol over diesel. I do mostly short town journeys with some dual carriageway and motorway driving and I’m returning late 30s in mpg.