I think the issue about the comparisons is we are comparing (generally) the one off final era to the GP era and you can't. Loram was an outstanding racer in the Chris Harris mould and was Screen and to a certain extent Smudger but they often lacked the consistency - although Loram did bag a title!
Regardless of era etc to be crowned three times is placing him almost alongside riders like Mauger, Olsen, Briggs, Rickardsson, Crump, Hancock, Gundersen and Nielsen etc in terms of greatness purely due to the numbers of titles they all won.