If roominess and reliability are the priority, the Sequoia is a great option. I would trust it off-road more than its domestic competitors, and definitely for quality in the long run. Our '09 Sequoia has passed 250k miles with no repairs other than preventative maintenance (radiator, etc). On the double din head unit note, check out the Alpine Halo11, it's a great OEM-looking large screen with Carplay and all the goodies.The Sequoia easily transports 8 and has the most comfortable third row of any of the big SUV’s. What it doesn’t have is the huge space for luggage, etc that the Suburban or Expedition Max has behind the third row. The Sequoia has the same engine as the LC 200, and has a great 4WD system . The interior js very comfortable but dash and tech is dated in spite of an update in 2018. The radio is double DIN so aftermarket large screen systems with CarPlay, 360 degree cameras, etc are available to update Toyota tech shortcomings. It gets lousy mileage although slightly better than the LC, I guess from part time 4WD. IRS gives the Sequoia a surprising amount of interior room.
As an alternative, another consideration is the Nissan Armada. It's pretty much a rebadged Y62 Patrol, which is the LC200's direct competitor overseas. In Australia and abroad, you'll see the Patrol on all the same trails as the Land Cruiser, with the same aftermarket community (ARB, OME, Ironman, etc). But, it's more in line with the Sequoia size wise, which is good news for carrying more passengers. Great off-roading capability, good reliability (I believe it's made in Japan, and is more solidly built than their lower quality crossovers and sedans), and fairly roomy. For the money, it's also a great value, with even the highest Platinum Reserve model starting at $65k (which is fairly comparable to the LC200's luxury).
The 2021 model (already available overseas), will have a refreshed exterior and interior. The front end is a little interesting, but I could see it growing on me.