I don't understand the 'no weapons' debate. People will always say Manning had tons of great weapons. I'd say the majority of those weapons were just young players before he started throwing them the ball and they suddenly became great.
top-tier qbs need consistency and playoff wins. Daunte Culpepper had amazing stats his first few years but that didn't hold up and his Vikings teams lost 41- in the playoffs.
Winning is important but most consider Roethlisberger a top tier QB and his Steelers teams have been up and down lately with no major success. Eli Manning is a sure HOFer but he's probably officially 'dropped off'. Rivers hasn't had the playoff success (no SB appearance). Brees won a SB and breaks records. Wilson won a SB but he's only shown it for one and a half seasons. Cam has no playoff wins but has shown small improvements each season.
I'd say right now Tom Brady and Peyton Manning are in a class of their own. Their teams win every year and they regularly outduel opposing QBs. Aaron Rodgers is one step below those two. His teams make the playoffs every year and he has the SB title but GB tends to be less dominate.
Aside from that you have Brees who breaks records, Wilson and Flacco with SB wins, Rivers with years of quality play though a few bad seasons in the middle of his career.
Everyone else is a step below trying to join the discussion (cam kap) or has dropped off from being at the top (eli ben).