The list of people over 100 who voted in Michigan: https://pastebin.com/XEi5Uy6t

Michigan state website where you can check the ballot status: https://mvic.sos.state.mi.us/voter/index

How you can verify that the person is really dead? Well, you can find the oldest living 4 people in the USA here: https://en.wikipedia.org/wiki/List_of_American_supercentenarians

None of them are on the MI list and the youngest is 113. So if you go before 1907 you can be sure they are dead. On that pastebin list there are 12 people born in 1900 alone and when you enter their info into Michigan database they are voted, I checked! Go check for yourself.