I went ahead and compiled a list of "black bar" memorials from what I could remember and a little bit of searching.

(It's probably not comprehensive, but it's clearly composed of computing luminaries and members of the YC community)

Dan Haubert (1984 - 2009)

Robert Morris (1932 - 2011)

John McCarthy (1927 - 2011)

Dennis Ritchie (1941 - 2011)

Steve Jobs (1955 - 2011)

Doug Engelbart (1925 - 2013)

Aaron Swartz (1986 - 2013)

Gene Amdahl (1922 - 2015)

Marvin Minsky (1927 - 2016)