Who are the players that should have reached their peak (or maintained it) when they joined a massive club, but it never quite happened for them.
I'll start with Henry at Barca. Villa at Barca.
Villa is harsh - he didn't do as well as with Valencia, but he was playing in Messi's shadow and contributed to a goal (goal or assist) every second game ... Not too shabby (not to mention the trophies!)
Henry's first two seasons at Barca were really good too ... 19 goals, 11 assists in season 1 & 26 goals, 12 assists in season 2 ... Granted, not like the #s at Arsenal but he was playing left wing forward most of the time and in that messi fella's shadow.