There is a new resource in Milwaukee called "Milwaukee's German Newspapers; an index of death notices and related items", covering death notices, many obits. and more entries for the years 1844-1950.
There is a Walter Klug indexed (d. 1892), no entry for Charlotte. And on Panfil entry.
Contact me directly for look-ups. I'm happy to provide this information from the most current version of the data.