Unfortunately, these guys are so close...it's hard to say which one would be the "best" #2.
That said, I agree with qnnhan7
- Kaep will make whoever is catching the ball a better WR.
Think back, (or Google it if you're too young) Joe got the Chiefs to the AFC Championship with (almost used up) Marcus Allen , Kimble Anders (FB), Willie Davis (WR), J.J. Birden (WR), and Jonathon Hayes (TE)!
Now...that was a sorry group!
Kaep has a top 5 TE, top 10 RB, and some average (perhaps better with time) WRs to work with.
I'm confident that by the time Crabs is back, the division will be in the bag.