If you're talking about size/speed/abilities. I'd personally look at Stephen Hill before I looked at Alshon.
Stephen Hill
6'5
215-220lbs
4.36 forty yard dash
Calvin Johnson
6'5
240lbs
4.32 forty yard dash
I'm not saying that Stephen is Calvin's twin. But they have a TON of similarities. Size, speed, same college, both can burn the coverage or go up over top and get the ball