Quote Kawa1170="Kawa1170"Andrew Dunemann is right up there for me.'"
Beat me to it.  He was alongside Borrow and McGuire for their early years and was outstanding.   Skillful and a very physical defender - which he showed off as replacement hooker when Diskin blew his knee out end of 2004 for GB.
I would add Martin Masella.  A beast of a runner and put in some massive hits.  Not hugely skillful but boy did he run into people hard - with and without the ball.  Great player.
Going wayyy back I'd have to say Neil Hague was one of the most versatile and durable pros you would ever come across.