I havent driven the navigator but I've also read here that the navi has a softer set up than the expy.
With that said, the ccd suspension would have the ride your looking for. I also like a soft ride and on smooth roads, its a floater, which i prefer. The eco mode also softens the ride even more but i think its too soft in that setting. I wouldve preferred to get the ccd, but i dnt want the 22s. I also noticed on some imperfections, the wheels woud pop slightly, but its only noticeable because the ride is otherwise very smooth. With the ccd, i would have no problem saying its the best riding in its class. I never driven the current sequoia, but ive read they dont ride as smooth as the last gen expy. The armada is the very close second. The 17 expy with ccd felt similar, a bit softer in comparison, but less controlled.
The ltd max i drove was far firmer, much more planted to the road. We didnt feel every bump in the road like you mentioned, it felt to me more controlled, planted, almost car like but i wouldnt call it soft either. The road we drove that one on was more varied though and a lot more cratered. The aforementioned wheel pop wasnt an issue with the smaller wheels but initial bump harshness is more readily felt. I will say a 15 ltd el i drove seemed a bit more forgiving on smooth roads, but again, the newer one is far more controlled.
If the truck you drive was rele that bad, i would say the tires were over inflated, or the springs need to be compressed a bit. I would drive a max with ccd to see if you like it, but as previously mentioned, noone whose bought either version has any negatives to say about the ride. By extension, the max version with ccd has been praised by all whose purchased. One guy said his purchased fx4 max is smoother than most vehicles he driven and the ccd was better. Another said the xlt max he tested was far smoother than his current grand cherokee, which has a similar ride to a previous gl450 i would assume.
Maybe we should open up a thread for those who have one to talk about the long term ride quality?