I was looking at 4D and thinking he does look familiar, when it struck me - it's Colin Rosenstiel, isn't it?
No, it isn't. Both of the remaining gentlemen are names that I (and many members here) are and will be familiar with, but where the cause is / was so much more than the person, and it strikes me from a quick read that Colin was along similar lines - though before I became quite the activist I am these days.