But be wary of a seat which forces the spine into an exaggerated lordosis or forward curve. See the man on the right in picture number 4. The car seat is a work seat but most car seats are angled down at the back. Many people then compound the problem by winding the backrest further back. The driver then hunches the neck and upper body forward creating a very strained position.
Some car seats are too soft.
Many have curves built into them which force every body into the same shape regardless of individual differences. Better is a more neutral seat of flat planes, soft but firm. No chair will automatically give you good posture - but some will make it easier, and some will make it impossible.