I bought a 2015 sonata with every single option for 21k with 20k miles for the same reason.
Reliable, very comfy, gets 33-34 highway on cruise, tons of toys (adaptive cruise, lane departure, 8 speaker stereo, heated & ac'd seats, remote start from phone), inexpensive to insure.... the thing has absolutely 0 character but is perfect for a commute where I sit in traffic on the interstate for 45 minutes.
IMO any of the full size sedans fit the bill. Accord, Sonata, Avalon, even the Optima. They're all boring as sin but if you have interesting cars in the garage it's nice to have a car that's comfy and relaxing.