Nor should we forget these cosmonauts
First, there was http://www.astronautix.com/flights/soyuz1.htm who died in Soyuz 1 just a few months after the Apollo 1 fire. He was the first man to actually die during a spaceflight. He was a veteran of 3 prior spaceflights before Soyuz 1.
Also, we should remember the crew of Soyuz 11/Salyut 1 who perished on reentry back in 1971.