I would be interested in hearing your list of generational talents. Off the top of my head:
I'd argue about Brady, as I think talent manifests its way in different forms. Not the strongest gun, but the best mind.
LT
Marino (for his gen)
RBs are harder...ED, Brown, Campbell (maybe)
WR - if you don't think Rice was a generation talent, not sure who you have on the list
DBs would require some definition: Woodson, Sanders maybe
Leaving off OL and DL guys for now.
That's a 60 second list......
In my lifetime I can think of a few generational talents. These are/were guys who took their freakish athletic gifts and translated them to on the field greatness.
Running back is the position with which I am most familiar.. so my list there would probably be the longest. Obviously Jim Brown was.. OJ Simpson was .. Eric Dickerson was.. Adrian Peterson was.. Bo Jackson probably would have been. Sayers might have been as well.. Barry was.. I don't include Payton and Emmitt because neither possessed any defining physical trait or traits that made them great.. Their greatness emanated from within.
I think Larry Allen was a generational talent at guard.. As was John Hannah a generation before him. Tyron Smith and Erik Williams are the two best OT's I can ever recall seeing.. but I admit I didn't watch o-line play when I was a kid the way I do now.
Reggie White and Bruce Smith were at DE. Jerome Brown and Joe Greene at DT.
Randy Moss was a generational talent at receiver.. It's hard to think of another guy with that level of talent who turned it into that level of achievement. Rice was not nearly as physically gifted, but accomplished a good deal more. T.O. was almost as gifted as Moss but was derailed by his own ego in many ways. Someone brought up Megatron.. that would be a good one.
Deion and the Woodson brothers (Charles and Rod) are the only generational talent corners I can think of.. Ed Reed, Polamalu and OUR Woodson (Darren) are the safeties who come to mind.
Rodgers and Mahomes are generational talent QBs.. I agree about Marino as well. Though I think Rodgers and Mahomes are better than him. Because I think their mobility gives them the capacity to do more to help a team win. Long story short, they can throw it every bit as well as Marino but can also get out of the pocket and make plays. They are what I think Roger Staubach would be in the modern game..
Obviously Lawrence Taylor was that monster at LB.. but quiet as kept.. so was Wilbur Marshall. Mike Singletary belongs in there somewhere as well. Some might argue to put Ray Lewis or Butkus in there but frankly I thought they both were more smart savvy football players than physical beasts..