Swiss, Cathay, Eva or the like. And they still get notably left behind by KLM, Lufthansa, Asiana, ANA, SAS, Virgin Atlantic or Etihad.  And those are just the ones I've flown on. I am sure there are others like Thai and Qantas. Delta isn't in the same league as any of those.

After a couple hundred flights on Delta, United and American, it feels like I have had just as many problems with Delta as I have with the other two equally lousy U.S. airlines.

I was on a crappy Air France flight a couple weeks ago, and I can't help but think that it reminded me of Delta; only at least AF has good food and (I am told) good wine.