I saw this on the NoHomers 20th Anniversary thread and while more people will likely see it there than here it simply needs to be given as wide an audience as possible.  Behold:

How much more cool could this be?  None.  None more cool.  This was drawn by Bill Mudron and his Flickr page has a version of the image that tells you who each guy is.  I only knew like four without clicking (including Groening and O’Brien, which are pretty easy.)