I don't think saying Perriman has the highest ceiling is biased at all, it's definitely Perriman or DGB. BP is far from the most polished which always creates doubts for teams but he is the total package, speed, strength, quickness, height, frame, YAC, body control, fights for the ball, and contrary to the media narrative, has great hands... the only things he needs to be a top tier WR at the NFL level are things that can be taught like route running, using his hands better to create separation, and just more overall nuance in his technique. Having Bobby Engram as his coach, Steve Smith on the field with him, and Flacco at QB put's him in a great situation to do that.