I always saw him as a number 3 receiver who was thrust into the starting lineup because Ted Thompson was stingy. Go look at his stats, they’re unbelievably pedestrian. Basically what you’d expect Terrence Williams to do if he had the most gifted qb in nfl history throwing him the football.
https://www.pro-football-reference.com/players/C/CobbRa00.htm
He essentially had 1 solid year, his contract year. How convenient.
Otherwise he’s basically a run of the mill slot receiver making 10m$ a year for some odd reason.