I hated the Francis Burke one. I think they realised they had a dud, because it didn't get much airtime.
And, come on. There is only one specific thing that Richo has done on the field which will be remembered - and that is the push-in-the-back against Mal Michael and his look of disappointment afterwards. Unless they just spent the whole ad making Tasmanian jokes, there is absolutely no scope for a Richo ad.
In no particular order:
1. Leigh Matthews, including snapping the post (probably the most well-known incident which hasn't been done yet), using the Predator quote to beat Essendon in 2001, and (if he has a sense of humour about it) the Neville Bruns incident.
2. Peter Carey - the mark is the obvious highlight (perhaps they could get him to take other marks, speckies, etc), and then they could poke fun at other assorted highlights from other umpires, perhaps with a confused Carey protesting "that wasn't me."
3. Kouta - Dave would use a giant novelty hand to do the one-hand Kouta-style ball-palming, they'd touch on the "Kouta's boots" fiasco, they'd poke fun at him for being on Gladiators, and probably go into the 1999 Prelim.
4. Sheedy - Sheeds would obviously be up for an ad. The jacket-wave, the mud-wrestling thing, etc.
5. The Enright one would be funny, but could a whole ad be done around it? Perhaps get three or four of the Cats players down, including Enright, to recreate some assorted bits from the Premiership year. Dave Lawson in stripper-shorts, of course.