He was certainly the most attacking full back I've seen and as a result used to score loads of goals for a right back. I also remember us being defensively sound with him in the team as well so he gets my vote, although he didn't have quite the same impact when he came back for the second spell.
Capt Kayos - As with Scotty and Alex Sc fi, best I have seen play is Pricey - exciting in his time with his bombing runs down the line and goals to boot which wasn't bad for a right back - remember his first game back the second time at Grimsby as well and as mentioned always appeared to add a bit of defensive stability.