You're really stretching denial on this issue santa.
I rate the ruckmen in the comp on three tiers (in order when fully fit):
Elite: Cox, Sandilands, Hille, Ottens
Budding Elite: Naitanui, Ryder, Leunberger, Clarke (big question mark here but we'll leave him there for the time being).
Average tryers: The rest.
While we may quibble over the order somewhat and you may insist on promoting past-it players like King, Gardiner etc. into the lower ranks of "elite," I doubt we'd rank them THAT much differently - i.e. Graham went head to head with two of the comp's top-10 ruckmen - top-6 IMO.
Your main argument for last week was a grudging concession that Graham was OK against Hawthorn, but that he would get smashed by Hille and Ryder - or any half decent ruckman.
He had 17 hitouts for the night, Hille had 23, Ryder had 19 and I'd be extremely surprised if either had more hitouts to advantage when directly opposed to Graham than he got against them...the majority of Hille and Ryder's hitouts to advantage were against the hapless Vickery - they couldn't dominate Graham.
So that leaves the major points of difference between Hille, Ryder and Graham's games as a) Ryder and Hille being able to smash Vickery in the ruck and in general play (a luxury Graham didn't have to boost perceptions of his performance), b) they had way above their average contributions deep in the forwardline in a winning side (again, a luxury Graham didn't have to boost perceptions of his performance).
Because of Graham's numerous hitouts to advantage and his efficient disposal all night, he was rated very close to Ryder's performance by CD and not that far behind Hille, DESPITE not having Vickery to smash, and DESPITE not having the opportunity to go forward and kick easy goals in a winning side.
There's nothing mediocre about that, certainly not from a bloke playing his 20th game, up against Ryder with 81 games and Hille with 158.
Currently, the only two ruckmen rated higher by average over Graham's average from two games this year, are Cox and Sandilands (in fact without checking, he may even be ahead of Cox's average). He's not getting massive hitout numbers to achieve his ratings like the two above him, he's getting a high number of hitouts to advantage and getting constructive possessions with high efficiency.
And while people will no doubt whinge that ratings are irrelevant, bar describing every contest in great detail, it's the only tool available to fill in the huge gap between what actually happened in the game, and the small sample of the game that most people can actually remember happening.
Graham's performances have been extremely promising from every perspective and IMO, anyone denying so has serious problems rating players fairly.