Scotty
David Codey (61)
Mate I remember people saying David Lyons would be the next Kefu.
The only 8 i've seen since Kefu, who could actually BE the next Kefu, is Vaea. Fotu looks impressive and pulls off the big hits, and flattens a few people in contact, but he doesn't actually make the metres AFTER flattening people. He hits them, Lomu's them, and then gets swamped.
Palu gets flattened by opposition scrumhalves, or has the Cheetahs No 11 run straight at him, and then into, and then THROUGH him. Then he runs over the Lions winger, and everyone goes into a circlejerk about it. For someone who is bigger than Kaino, or Reid, he's an absolute softcock, and one who's never performed outside of Super rugby or NH tours against Italy or Ireland.
Vaea is the only player i've seen since Kefu who can run into contact, bump someone off, and NOT LOSE MOMENTUM, so that he then keeps going and doesn't just go to ground 3m after the first contact. He's got a lot to work on, eg hands at the scrum, option taking etc, but he's got by far the most raw potential of any 8 i've seen since Kefu called it quits.
What made Kefu successful is that he didn't really try and do the straight run into people, he had footwork to go with speed off the mark, and tried to make sure to hit the gap as a first option, second option to off centre contact on the defender, and hence able to keep momentum.
No matter how big you are, if you try and run straight over someone, you are always going to slow down and if there are defending players next to him, you will get stopped.