I agree, There is still a long time to begins World Cup. Many things can be happen and will change during this time.
Actually it seems to me there are few groups which have more potentiality to get the World cup 2022. In my opinion, we will get the winning team of 2022 from Group C, Group E, Group G and Group H. Specifically, Argentina, Spain, Germany, Brazil and Portugal are very promising.
Along with the countries you have listed, I would add Belgium and France as well. I would rate them ahead of Portugal, because the latter is entirely dependent on one player. For me, Argentina and Brazil are having the maximum chances, but some of the UEFA nations are quite capable as well. But then, international football is very unpredictable. Who in their wildest dreams might have thought that Croatia would reach the final of 2018 World Cup? It will be real fun, if such a lower ranked team manages to reach the finals this time.