I was most impressed by Mort Drucker's ability to make an instantly-recognisable caricature with only a couple of lines in a small space. There are actors in the background of movies whose names I've never known, but I recognise in the background of his drawings.
Yeah I agree that Mort Drucker was fantastic, I also had a fondness for the more wacky style of Jack Davies and extremely wacky style of Don Martin, oh and Sergio Aragones, damn they had so many great artists on that magazine.