I'll admit that I don't have a great grasp on my DC lore and, if your username is any indication, you clealry know more about the Ant-Man legacy than me. I was just suggesting that Pym isn't very well known and Lang is even less known than that. Your right in that it would probably be more fair to present Pym as Giant Man or Yellowjacket rather than Ant-Man. Wasp is just as important as Pym (to the team not in regards to accomplishments).
But, and don't take this the wrong way, Lang was an Avenger for all of five minutes. He was created 16 years after the Avengers was founded and didn't really recieve full Avenger's status until 2003 (and was killed off shortly after). Hell, his daughter may be more significant the M.U. I have nothing against Lang but if it comes down to Pym or Lang, Pym is inifinitely more important.
EDIT: I know Lang's back now.