The Bills have been looking forever for that Big Nickel to match on TEs like a Chinn or Dugger. The closest they used to have was probably Siran Neal, a size/speed type of guy, but he was not terribly fluid and his speed was mainly straight line, he wasnt quick. The closest they have now might be Jamarcus Ingram, good size and length at 6'2", a bit light and not quite as fast (4.6). I don't know about his man skills, the plays he made vs Miami were system-generated and he benefitted playing his zone.