Replace every instance of "Brett Favre" with the words "Peyton Manning" and you have a decent argument. How does Manning not make it in the top 5 amongst QBs, over Marino and, ugh, Favre?
Tomlinson doesn't belong anywhere near that list. His career is already on its way out the window. Yeah, he's great now, but in all honesty Terrell Davis was a more dominant back in his heydey and probably won't ever even be a Hall of Famer. Putting him as the fifth greatest of all-time without even mentioning the greatest running back of all-time (OJ Simpson), to say nothing of other great backs like Earl Campbell, is a horrible travesty.
Cris Carter as the fourth best WR of all-time? Jesus, he might not even make the HOF this year on his second attempt. I think Terrell Owens has been better throughout his career than Moss, despite his character flaws. Moss deserves to be there in the top 5, but Carter certainly doesn't (Hutson played so long ago that I don't know if he belongs in a conversation that seems relegated to the modern era). To say nothing of Steve Largent, who almost certainly belongs over those two. And for what it's worth, I think Andre Johnson will be on that list when all is said in done. Even moreso than Moss and the absent Owens, Johnson might be the current guy most likely to threaten GOAT status at WR.
Where's Ben Coates on the tight end list? He was just as good as Shannon Sharpe, if not better (Sharpe had Elway to toss him the rock). And if we're going to argue for the current tight end most likely to end his career as the GOAT, then put Antonio Gates down, not Tony Gonzalez (who has certainly been a great TE, and probably deserves to be on that list, but is at the end of his rope).
On defense, only Ed Reed has a realistic shot of challenging for the GOAT status at his position against Ronnie Lott (frankly, I'd already put him there). Maybe a couple guys at nose tackle (Wilfork?), but Ted Washington was so dominant in his day that it would be tough, and poor Ted probably won't ever get any sort of Hall of Fame recognition (then again, nor will Steve Tasker or Ray Guy, the GOAT at their positions).