Hehe, I was just playing as Taric and I had so much armor that all damage caused to me was nullified by 70% not to mention the fact I could bust tons of heals on myself if I wanted. I soloed turrets and there was one part where four enemy champs chased on me at once and despite the three exhausts I actually got past them back to safety. they sucked richards or Taric can really take it.
Also, whenever I see a gragas rather he's on my team or the enemies he usually hardly helps. But, I know what you mean. There are some weird ass freak players that are like masters of escape and stuff and you just can't kill them. I once had an issue like that with a very well fed Mundo.