There's a misconception for some that "elite" QBs carry teams without any help. That's never been true in the NFL.
Tom Brady leaves value on the table so the team can put weapons around him. They turn over personnel pretty quickly but it's a rotating group of excellent players they bring in. Right now he has one of the best big targets of all in time in Gronk, along with Edelman and Josh Gordon.
The year that Peyton Manning won the Super Bowl with Indy? He had Marvin Harrison, Reggie Wayne, and Dallas Clark as receivers. Their defensive line had Dwight Freeney, Robert Mathis, Tony McFarland and Raheem Brock.
The 2010 Packers had Greg Jennings and Donald Driver at receiver and an elite front seven on defense. They added Finley and then when Jennings left replaced him with Jordy Nelson. There have been some years when Rodgers didn't have many weapons (largely due to injuries at skill positions) or the defense has been bad, and the Packers haven't gone anywhere in those seasons.
Philip Rivers is having a career year and it just so happens that this year the rest of the team around him is the best it's been since he got there.
"Elite" is an arbitrary definition anyway but if your definition includes winning with no help then I've never seen an elite QB in the NFL.