As far as gift of the ox not being useful on the fight you just proved you have no idea what the hell you are talking about. Anytime I get to medium to high stacks I have a mountain of orbs to both sides of me, if you're wasting them before you actually need them that's your lack of skill not a class problem
Between EH and GOTO no tank has the reliable spike healing instants of a Brewmaste, that is a fact. Your point about dps and zen med is worthless because even if a Monk spends 12s of the fight in zen med between whirling corruptions, or soaking annihilates a DK or Pally still can't do more damage then them, and if a monk doesn't they still won't out dps a warrior. Your point made 0 sense for actually ranking tanks on the fight.
Plain and simple if you think 1 tanking Garrosh on a Monk is dangerous it's a l2p issue. Monks are the clear best choice after Warriors, and Warriors are only the best because they are the highest dps along with providing better tools in the transitions, not because they can survive the actual 1 tank part of the fight easier.