The low riders all achieve the low centre of mass by putting the brick next to the motors rather than above them. That makes them poor choices for maze-running, for example. There is of course, no 'one size fits all' robot solution for all possible situations. I tried to make a model that is as narrow as a front-wheel drive EV3 vehicle can be, and this is the result:
The model below is just as narrow but has the advantage of a sloping brick which makes the screen easier to see. Compared to the model at the top of this page it may have a slightly higher centre of gravity and longer wheelbase.