Which other legendary Pittsburgh Steelers numbers should be retired?

I hope this pushes the organization to give their legends their official flowers sooner. Steelers history is far too rich to only have 2 Jerseys officially retired. Franco should of had this

In The Shadow Of Greatness: History Of Steelers Who Inherited Legendary Jersey Numbers - Steelers Depot

Pittsburgh Steelers safety Troy Polamalu says he's retiring after 12 seasons, NFL

Heath Miller Retires: Steelers' Mr. Reliable Was Steady to the End

Steelers' Pickett began his rookie season avoiding spotlight. Entering Year 2, it's shining on him. – KGET 17

Minus 'the big man,' Steelers retire Franco Harris' uniform number in emotional ceremony

Franco Harris: Did the Pittsburgh Steelers retire number 32?

The 25 greatest Pittsburgh Steelers of all time

Steelers retire Franco Harris' No. 32 in somber ceremony at Acrisure Stadium

Why are some Steelers jersey numbers sacred, but others aren't? - Behind the Steel Curtain

Pittsburgh Steelers Hall of Famers