As several have already said here, it's NO BRAINER.
If you had to point to one person that was responsible for our Phoenix (the bird, not the sun...OK, bad analogy) rising from the ashes, it was Chris. Hands down. No argument, except from those that have some personal axe to grind.
I also wouldn't use Richmond's jersey retrirement as some sort of notch on the wall that has to be equaled or exceeded. Two different players that brought uniquely great things to our franchise.
#4 will hang from the Arco rafters within one year after Chris hangs 'em up.