It's possible if one sees Vickery as a permanent forward - let's not forget he played out of the goals square as a junior and he's played his best football at AFL level as a forward. Besides, there's three very important issues at play here -
1. Maric isn't goiing to play every game and we have nothing to cover for him in the event he goes down.
2. Vickery has just undergone shoulder surgery which may impact his vertical reach and hence may inhibit him in ruck contests
3. We need to start thinking about succession planning when Maric eventually retires, that could be as sooner rather than later given Ivan will be 27 next year.
Some of the arguments here about the risks of taking rucks in the top ten seems to be set in the past, we can dredge up Kreuzer to back up the point but he's still a talented player and would comfortably slot into the top ten of his draft year.
The success rate for top ten ruckman has been exceedingly high recently and all have managed to hold their value - Naitanui, Leuenburger, McEvoy, Vickery, Ryder and Longer (although it's still early days)
We could wait for free agency and join the scrum but that doesn't necessarily guarantee we'll land the fish, the competition will be fierce , particularly if everyone has decided to avoid recruiting junior ruckman. For mine, pick 9 isn't too high a price to pay for a ruck who has as a huge upside like Grundy, and even in the shorterm, it means we don't have to go and recruit Wood or Stephenson (only to delist them down the track).