I think you might be right, though the chances of him ever having another top 50 single (while he's alive) are probably slim!
I think I might expand on this, and do it as a follow on piece to All The Best, covering the period after Once Upon A Long Ago. Once you've thrown FITD, Flaming Pie, and even Off The Ground in to the mix (not so much Driving Rain!) this could end up pretty stunning, and might even blow away All The Best!
That'll be a fun way to spend my Friday night