I've just posted a message on my ancestor, Karl Konrad Amsler, who came from a different town in Aargau, and whose line has been traced back to Ulrich Amsler (c. 1560 Argau -- ) and wife Katharina Rimiker (c. 1564 Aargau --).
I'm wondering whether you might come down from Ulrich, also.You might be able to jump your brick wall with a DNA test.You could start an Amsler Y-DNA group and get the group discount.
You may know that a Y-DNA test requires a male direct descendant with the same surname as the ancestor.It tests the direct paternal line from father to his son to his son, etc. all the way down to the present generation test subject.So you'd be the right person to register your ancestor's DNA in the historical record.See testing company website familytreedna.com for more info on Y and mt DNA testing, FAQ, pricing, etc.I recommend at least the 25 marker Y-DNA and preferably the 37 marker (plus the mtDNA if you want to investigate your direct maternal line).
Would you be interested in doing a Y-DNA test to see whether your ancestor has a common ancestor with mine?I'm in the process of locating an Amsler descendant of my ancestor Karl who can do it from this end.