Drew Brees. He just gained Eric Johnson and Robert Meachem, and he retains Marques Colston and Devery Henderson. Not necessarily the very best in the NFL but definitely good enough.
Or perhaps Matt Leinart. Three fantastic receivers and terrible NFC West defensive backfields.
I will also bring up Marc Bulger for that same reason. He picked up Drew Bennett and still has Holt and Bruce along with two young tight ends to throw to.
Finally, the last name I will say is Jon Kitna. Calvin Johnson, Roy Williams, and Mike Furrey is no shabby wide receiving corps. If he doesn't get replaced by Drew Stanton midseason he should have a good passing season.