I think most of Chicago's "Ethnic white" neighborhoods are very diluted these days.
Bridgeport used to be quite Irish and some Eastern European like Lithuanian, but between Latino and Chinese arrivals it's nothing like in the days of the senior Daley. Beverly might still be fairly Irish.
Pilsen, obviously, hasn't been Czech in generations.
The Ukrainian Village has Ukrainian churches, at least two Ukrainian museums, and a few Ukrainian businesses, but the end of mass Ukrainian migration meant Latinos moving in and gentrification has brought hipsters and other generic whites.
Despite a couple remaining businesses, nobody would call Germans dominant in Lincoln Square anymore.
Despite a museum dedicated to Swedish-Americans, a water-tower with a Swedish flag painted on it, and 2-3 Swedish food related places, Andersonville hasn't been dominantly Swedish (or even northern European) in quite a while.
I'm not sure West Rogers Park was ever dominantly Russian, but it certainly isn't now.
The Poles who kept pushing NW along Milwaukee still carry a presence in sort of the Cragin, Belmont-Cragin, Old Irving, and Portage Park areas, but I would be surprised if they even comprise 20% of the actual population there. It is probably one of the most strongly represented "ethnic white" area of the city by number of visible businesses, though. Lots of Latino people, too, though, and a smattering of Filipinos. I like that at Tony's Fresh market on Belmont near Central you can buy Polish and Latino foods in the same place (I once saw canned "Mexican mixed vegetables" in a jar written in Polish with "Made in Poland" on it - now that's diversity ...)
Little Italy has a few restaurants, but it really doesn't have Italians like old Little Italies used to.
Humboldt Park hasn't been ethnically German/Danish/Norwegian in a long, long time.
Greektown is only Greek by virtue of restaurants.
There is a "Little Latvia" filled with Latvian Chicagoans, but apparently
it's in Three Rivers, Michigan ...