You will get very varied, and frequently contradictory, advice on this topic simply because the perception of seat comfort is a very individual thing. What feels good to one person can be like torture to someone else.
However, since, like you, I can’t drive a car with low seats, I will share my experience on that topic. I have found that Honda seats are typically set very low to the floor, leading to a “legs out” driving posture. Because of this factor, I can’t drive a Honda Accord for more than 30 minutes or so without severe lower back pain.
Other than this generalization, I can only advise you to do a lot of “test sitting” and–hopefully–some extended test drives of the ones that seem to be comfortable.