>>7249215I (no pun intended) drive myself crazy sometimes when it comes to fitting minifigures in vehicles. Pic related I built like 7 years ago, I managed to fit 5 figures in it on top of a steering/suspension setup.
For me 7 wides are the best scale when it comes to balancing fig fitting, vehicle size, and features. Sure it's possible to dip below that scale to a point, but one thing or another usually has to give.