I should know the second ascentionist but can't remember. If Phil Davidson did the third, could it be Gaz Healey?
Dom Lee has recorded an ascent in the UKC logbooks for May 82, which puts Nick Dixon and Johnny Dawes down to 5th and 6th
Looks like Mike Owen has also logged an ascent in '83 which would put him ahead of Johnny Dawes and Nick Dixon.
I think @TdG got the Dawes and DIxon claim for fourth and fifth ascent from Johnny's book, so I guess either the date in Johnny's book is off or he's missed a few ascents when workout out what number he and Nick were.
I've cleaned up the ascent numbers a bit so hopefully a little more accurate now.