I'd go for Mark Gall or Peter Sayer as the quickest but I'm struggling on the slowest as my immediate thought was Kerry but I think that may be a bit unfair.
Maybe Mick Ferguson as I only remember him as a lumbering buffoon
Who was the guy we had on loan from Charlton a couple of seasons back - got stabbed last year as I recall - he was quick, no end product mind.... Slowest, was probably Butters, but his age was against him. Mayo wasn't too quick though and he's only 31