Geelong of 89 to 95
This is the right answer for me.
Their midfield was so stacked - Couch, Bairstow, Bews, Hocking - they had tough support all over the ground, and they had Ablett (and Brownless). By '95 they also had young guys coming through...
Ran into buzzsaw, all time great teams in '89, '92, '94 and '95 and were unlucky in that respect.
The year they should have won was 1993. In the most wide open season ever, they had a mid-season slump that culminated in bad losses to 10th and 11th (out of 15) placed Melbourne and St Kilda (the latter by 71 points absolutely wrecked them).
They rallied and won their last 5, beating North (eventually 3rd) by 94, Hawthorn (eventually 4th) by 82, West Coast (eventually 3rd) by 20 and Essendon (eventual premiers) by 32. Managed to end up 7th but equal with both 5th and 6th (missing our on percentage) and only 1.5 games off top spot.
Funny thing is, if they win those two extra matches (Melbourne and St Kilda) they finish top, steamroll Essendon in their first final (missing Hird, Misiti and Fletcher if I remember correctly), and cruise into a GF. That was their year, and they just screwed it up IMO