Haha, good one. Rice has 7,000 more receiving yards than Moss, close to 600 more receptions, 40 more Touchdowns. Yes he played longer but that shows just how good he was. Age 40 season he had over 90 receptions, 1200 yards, and 7 touchdowns....
I think it's a fun debate. For a career obviously Rice is the best. Who had the best season or the best few years in their peak? In some ways I'd still say Rice is greatest per game or per year in terms of reliability, he's not the most gifted athletic player to play his position though.
As a big NBA fan for years Kareem had the best career stats but it was widely accepted that MJ was the greatest player in history and Kareem hasn't often been widely considered greatest of all time but more in the top 5 discussion. Now it looks like LeBron is going to own all of those career stat arguments but there's still a bit of a debate if his most dominant stretch matches MJ's and the fact that his per year production is probably going to be lower.
For ISU I could see that TD was more of an athletic freak than Brock...but so were Hall, Hakeem Butler, Lazard, Seneca and quite a few others even on last year's team alone. Brock is the definition of a gamer. Tom Brady probably isn't in the top 25 of any physical metric historically for his position other than between the ears.