Broncos last win prior to the Manning one was 1999, so 18 years ago. they won 98 and 99 though. They WENT to two recently, but got curb-stomped by the Seahawks in the first one. Baltimore won 2001 and 2013. No one else has more than 1 in that span other than Steelers (06 + 09, plus the loss to the Packers).
I felt Steelers were the obvious/default other team because they were in the playoffs pretty much every year for the past 10-15 (couple missing out of that span, but pretty consistent). No one else really had that kind of run without some real turd seasons mixed in. Baltimore had some bad ones mixed in with their two wins, Steelers were better overall, and more of a 'threat' to the AFC over that span. Most of the time, didn't feel like Ravens were really pushing the league even when their record was decent. Kinda like the Giants on the NFC side. Yeah, they won two (damn them!), but were they a perennial threat? Nope, they sucked out loud more often than they made a decent run. Except for those two years.... *sigh*
By straight up SB wins, I guess that makes Baltimore #3, but really feels like they're more in the pack with anyone that won one, or went to some and lost or whatnot. If you said Broncos over Ravens, can't really argue despite the extra ring. Broncos felt artificially inflated, though, and are already back in cap jail after the Sell Out for Manning plan. Colts were bigger for a longer run, despite their one ring in the period. Second Manning left, the wheels came off, though. It was Pats/Colts/Steelers for the first half of the last 15 years or so, Pats/Steelers/Flavor of the Week for the second half.