Over the years there must have been many riders who 'should' have won a TT.
I always think it is hard on riders who have been leading a race, and then it is stopped. It now seems to happen much more often that a race is 'red flagged', but back to the original question-on my list would be Jack Brett, Pat Hennan, Roger Marshall, Nigel Davies, Bob Jackson.
Of all the 'bike' forums, this one was the original site that I first joined, well done Malcolm for keeping it going.