Depends a bit on one's age and therefore access to some older types - as more recent a/c don't count.
On that basis I have an advantage, but not in hours flown & it's taken me 47 years to pilot ten from his list then only at the very light end. However all done at my expense - no contributions from aviation employment or the RAF, etc. !
I should imagine his achievement is several multiples more than anyone else could match, even if one includes all a/c.
mike hallam.