Rice was was also generally with a primary QB his whole career, and both - Young and Montana - are among the greatest of all time.
Moss has never had any real stability for his assault; the best was clearly Brady but that was short lived. One of the years he was with Brady he broke the single-season record for TDs. :2 cents:
If you take Jerry Rice out of the equation, the 49ers offense becomes an absolute joke:
Below is a list of the 49ers offensive ranks by year first with rice, then if you take him out and factor in a league average receiver.
1988: 7th, 15th
1989: 1st, 12th
1990: 8th, 15th
1991: 3rd, 8th
1992: 1st, 9th
1993: 24th, 28th (last)
1994: 1st, 16th
1995: 1st, 10th
1996: 3rd, 8th
1998: 3rd, 7th
Moss at his very best, under the same rules as above:
1998: 1st, 4th
1999: 5th, 7th
2007: 1st, 6th
Without Moss at his very best, there would've been a 5 level drop-off in production offensively. Rice, at his WORST was a 4 level drop-off. Yes, Brady broke the record, however if you look at that season, it was an all-time high for the Patriots in effective running yards, meaning the offense probably would have been very good even if simply running the ball. Rice wasn't a product of a system as Moss has been shown to be, and in the end, it's not even a close call.