The only other ones I could think of are The Dandy and Beano, but I can't find cover scans of those issues. And for whatever other title(s) I might be ignorant of, this is certainly a select group. Archie hasn't made it to #600 quite yet, Superman and Batman haven't made it to #700, and not much else even comes close.
So for those of you who collect Action, Detective, 2000 AD, The Dandy or Beano, good luck! You've got a heck of a ways to finish your collection!