Just about any Bentley would be a dream ride-sharing draw, but having a top-shelf Mulsanne Extended Wheelbase lurking an Uber or Lyft app click away is the stuff of ultimate fantasies.
For this model, Bentley added a whopping 9.8 inches to the Mulsanne's wheelbase, which enables long-legged luxury like this, complete with pop-out ottomans and tray tables.
You can even spec a pair of "Bentley Theater" rear-seat tablets with wireless headphones and a bottle chiller. Pass the bubbly.
BMW's 7 Series has always been among the best driver's car in its segment, but it's only recently gotten its second-row act together from a sybarite's perspective.
In addition to rear screens and fold-out work tables, reclining massage seats can be optioned.
An optional pop-out tablet that keeps tabs on HVAC settings, audio controls and other vehicle functions has its own motorized cradle in the center armrest.
If you don't think a Volvo belongs on this list, you haven't been in one of its models lately. The XC90 already has one of the best cabins in the business, but the Swedes' new $105,000 Excellence model is positively next level.
US Excellence models have four individual seats, but in other markets, Volvo has gone so far as to remove the front seat entirely for a Lounge model, clearing the room for a separate ottoman and NBA-spec legroom.
In the overseas Lounge model, there's also a table with storage for your fine jewelry, pens and so on. It flips out of the way to provide movie or work viewing on a 17-inch screen.
Back in here North America, this seating configuration isn't available yet, so buyers will have to console themselves with Swedish Orrefors crystal and an available twin bottle chiller.
For 2017, Hyundai has spun off Genesis into its own luxury brand, much like Toyota did with Lexus.
Because it's targeting premium buyers, Genesis really, really amps up the amenities in its high-end sedans, including this range-topping G90.
In the G90, it's not just the power-articulated heated and cooled rear seats that speak of luxury, it's the double-pane glass and concert-hall-worthy 17-speaker Lexicon audio system.
A rotary multi-controller in the fold-down armrests allows rear-seat passengers almost as much control of vehicle functions as the driver.
No ultimate-luxury list would be complete without a Land Rover, but the company's Range Rover flagship probably wouldn't have cracked the list without this extended-wheelbase model.
Land Rover's new SVAutobiography trim looks like a million bucks, but starts at $200,000.
Semi-aniline, organically tanned leathers, sustainably harvested wood veneers, power-operated laptop tables and mohair carpets are nicer than what you'll find in the living rooms of most mansions.
Yes, that's a wooden floor in the cargo bay, and you can specify one that slides out for easy loading and unloading. You know, in case your chauffeur has a bad back.
If there's one car on this list that's realistic to land on from your favorite ride-sharing service, it might just be this one.
The all-new-for-2017 Continental is a return to full-size luxury sedans for Lincoln, and it's a welcome one.
There's plenty of legroom in the back of the reborn Continental, along with supple leather and a startlingly good 19-speaker Revel audio system.
One thing that there's not quite enough of? Headroom, especially with panoramic-moonroof models.
In fact, the Continental's front passenger seat may be the best one in the house.
Lincoln's optional Perfect Position front seats feature 30-way articulation -- the most in the industry -- including individual leg extensions and Eames Lounge-like looks.
Daimler put its ultra-lux Maybach brand out to pasture a few years ago, but its disappearance was short lived.
The name has once again been applied to a stretched version of Mercedes-Benz's sterling S-Class sedan, and dollar for dollar, it may offer the planet's most luxurious back seat.
Starting at over $191,000, the V12-powered Mercedes-Maybach S600 oddly feels like good value compared to rivals from Bentley and Rolls-Royce. There's even a less-expensive S550 model that starts at $161,000.
It's like a business-class airliner back here. Exclusive touches include an available electrochromic dimming panoramic moonroof and a 13-speaker Burmester audio system.
Just check out those ultra-soft suede-finish headrests. There's even monogrammed throw pillows, for goodness sake.
So you say you're a captain of industry who likes to drive his or her own ship every once in a while? Fear not, we have just the ride for you. It's Porsche's redone-for-2018 Panamera, which promises to be an even better steer than its already-great predecessor.
When it comes time to hand Jeeves the key and slip in the back seat, you won't be disappointed. There's surprising room in back in long-wheelbase Executive models, with deeply sculpted seats and plenty of amenities.
Twin moonroofs, twin screens and a 21-speaker Burmester audio system in what is probably the quickest sled on this list. Things could be worse.
Need more room for golf clubs and blueprints for your new world headquarters? Allow us to suggest the gorgeous new Sport Turismo wagon model.
Cadillac's new CT6 may not be quite as vast as some of the other cars here, but it's still got very posh rear quarters.
Power-articulated rear seats are available with heat, cooling and massage functions. And somehow, Cadillac has managed to cram 34 speakers in the cabin for its stunning optional Panaray audio system.
Dual 10-inch displays are retractable and come with wireless headsets.
You didn't think you could get through a list of most-luxurious car seats without a Rolls-Royce on the list, did you?
This particular car is one of 20 Bespoke Serenity Extended Wheelbase models. It's indicative of the level of custom hand-crafted work Rolls-Royce will happily let you specify if your wallet is big enough.
To give you an idea of how much work goes into one of these wild Serenity bespoke models, the Asian robe-inspired flowers are hand painted directly onto Chinese silk. Rolls says the process takes some 600 hours of work per panel.
Just think about the insane level of hand craftsmanship that's required of these delicate flowering wood inlays.
The Phantom is in its final year, and it's the oldest model here by some margin. But even with its comparatively dated technology, it's still likely the most opulent and sought-after car here.