Mcilmoyle and Peacock were the 2 best I saw for Boro.
I've followed the Boro since 1962 and I doubt whether this guy can be beaten. Possibly the closest would be Alan Peacock. Strangely both, and Archie Stephens were not particularly tall, but had amazing technique. A well documented destruction of QPR at Ayresome Park showed he was a much more complete footballer than just a greater header of the ball.