You're not wrong about GC, but they had four injuries in one position! No team can cover that.
I think most clubs would have two 'match-ready' AFL rucks', plus makeshift or developing options.
Adelaide - ROB and Strachan
Brisbane - McInerney and Fort
Carlton - Pittonet and TDK
Collingwood - Cameron and Cox
Essendon - Draper and Phillips
Freo - Darcy and Jackson
Cats - Stanley and Ceglar plus Blicavs
....
I'm sure I could go on. I just don't see the point in adding someone to the list who we don't think is any good, and wouldn't get a game ahead of Bruce/Darcy/a midfielder rucking.