Harrison, Peyton Manning's top receiver while with the Colts from 1996-2008, holds the record for most catches in a season: a hard-to-fathom 143 in 2002.
At the time of his retirement, Harrison ranked second only to Hall of Famer Jerry Rice in NFL history with 1,102 catches and most consecutive games with a catch (190).
Dungy coached Manning, Harrison and the rest of the Colts to victory in the 2006 Super Bowl, becoming the first black head coach to win the championship. When he started out his coaching career, Dungy said, there were only a half-dozen or so other black assistants.
"It wasn't a situation," he said, "where you had a lot of role models."
Also elected on Saturday were Brett Favre and the late Stabler, a pair of kindred-spirit QBs who each won a Super Bowl, in addition to modern-day players Kevin Greene and Orlando Pace, and former San Francisco 49ers owner Ed DeBartolo Jr. The senior selection was former Chicago Bears offensive line coach Dick Stanfel.
Harrison was not present at the announcement and engaged in an awkward conference call during the news conference for other inductees. Dungy called Harrison "the most artistic receiver I've ever been around."