You listed a bunch of players as though that's who Flacco has had as his group of receivers. That's one at a time for the receivers (and one year with none of them), and didn't have those tight ends playing much together at the same time, either. Basically, Flacco has mostly had one solid veteran receiver and one tight end each season. Eli has certainly had several seasons with multiple good receivers playing. He hasn't had an embarrassment of riches or anything, but I do think he has had it better in the RECEIVER department, and Shockey was a pretty good TE for a while with him. As far as overall team, Flacco has been blessed to be on the better end of that coin.