The Giants franchise became elite after winning the 2011 Super Bowl. To win the SB in 2007, go 30-18 the next 3 years, and then win it again in 2011 is elite. You say going 30-18 isn't having success. That's your view, it has dick to do with my opinion.
SF isn't elite. Atlanta isn't elite. Denver isn't elite. NE's track record since Brady has been around is why they're still elite. Baltimore I'm weary about b/c they last won the SB in 2001 though they do always make the playoffs so you could make a case for them being elite I guess.