It's really hard to decide which nation-state would be left hanging. But seeing how Germany is being hit because of their dependence on Russian energy may be the catalyst to them seeking more and more alternatives until they can depend fully on themselves which I think would favour them in the long term.
Spain on the other hand is another case but I think they will find it hard to thrive compared to Germany which is probably going to be in good shape 10 years from now if they get to solve all their energy problem.
But we never know this might be the era of a mighty Spain we were not expecting.
Yes Germany's problems are because of their dependence in the Russian Gas i also believe if they solve it they will return stronger