Equipopulous Europe
I am strangely fascinated by this map that depicts the European Union as 28 equipopulous member states (although i would rather imagine this as administrative territories rather than as states):
Twenty-eight equally sized European Union Member States, by Alasdair Gunn
Of course this is utterly unrealistic as (re)drawing borders has been one of the most destructive activities in the history of humanity. So the only way to improve on the current situation would be to do away with border altogether.