Ethnic groups settling the Midwestern states

Various ethnic groups have settled the Midwestern states, which makes the research on any family line challenging. (I know that mine certainly is!) Major identified groups are:

African Americans
Austrians
British
Canadians
Cornish
Czechs
Danish
French
German
Greeks
Hungarians
Irish
Italians
Native American
Norweigans
Polish
Russians
Scottish
Slovaks
Slovenes
Swedish
Swiss
Welsh
Yugoslavs

I do remember vividly as a young genealogist being excited to look at Great Lakes immigration, ship passseneger lists and port records for immigrants, since so many of my German ancestors came through the Great Lakes to Milwaukee, but alas, no such records exist.