Here is a list developed by the professionals, the Audio Engineering Society. True, it only would contain names of people who were alive when the list was developed and it does contain names of people who weren't on the "Hardware" and "Consumer" side of audio electronics, but I thought that it was worth browsing anyway. Many names will be unknown to most of us, but there are some which we should know, including Bob Ludwig, Wendy (Walter) Carlos, Robert Moog and Joseph Giovanelli (whom you will know if you read Audio Magazine).
http://www.aes.org/aeshc/docs/oralhist/ohp-recommended-interviewees.html
http://www.aes.org/aeshc/docs/oralhist/ohp-recommended-interviewees.html