I had a Mercury Grand Marquis that I can’t recommend highly enough. You can still pick up used ones at a reasonable price and they truly are bomb proof with regular maintenance. By far the largest trunk available, the 4.6 V8 has plenty of power, and for our family of 5 we travelled everywhere across Canada in it. We bought a used 2002 and drove it for 7 years, put 180,000 KM on it and the ONLY non-standard maintenance repairs that we had to do to it were brakes once, exhaust once, tires once (also snows), and new headlight units. What’s not to like. . . . . it was big, safe, and cruised along the highway fully loaded averaging between 9 and 9.8 litres per 100 KM!