Czechs are very slavic with little Geramnic input. The population stayed apart. North Italians have some German input but not a lot. Baltic peoples are neither slavs or Nordic. They're balts(Lituania and Latvia) or Finno-Ugrics(Estonians). Estonians have Nordic blood because of Swedish colonialism. The balts are an insulated population who's language bears strong resemblance to Sansrkit.

Spain had a little German input due to the Vandals. The nations in Europe that can truly considered to be strongly Nordic are the German lands, the low countries, Britain and Northern France. Germans were expelled en masse from Eastern Europe following WW2. Most Germans in Russia either fled to the US, Brazil or Germany.

I understand the admiration for the nordics. They have an ability to make extremely prosperous and high functioning society. But one has to wonder if they are too nice to survive in this world. They are too individualistic and way too conformist and social. In a globalized world, you need tribalism to survive. A solution might be a Slavic-Nordic mix race. One that has high IQ and a reasonable level of tribalism and racism.