Torygg still worshiped Talos but didn't have the guts to stand up for it like Ulfric did, he took the bribe money and betrayed one for his Gods. I respect Torygg for going into the ring with Ulfric knowing he would most likely be killed, but not for refusing to stand up against the WGC. Ulfric is not a saint far from it read the Bear of Markarth if you think his $hit smells like roses. But at least he's less stupid in my opinion because he still fights to worship a God and not take money to outlaw him.
Ulfric never requested Torygg's help, but rather issued his challenge and killed him. I personally believe if Ulfric requested Torygg to raise an army of angry Nords to give the beat down on the elves, spear headed that army with a combatant-general (a general who fights as well as leads) like Ulfric, who is by all accounts a master of the voice and nearly a grey beard, and Skyrim alone could declare independent war on the Dominion and raze all blood Nordic hell, crush the Dominion forces preoccupying the Redguard rebellions in Hammerfell from attacking the Dominion, and now you got and army of angry Nords and an army of pissed off Redguards who have a reputation for being master warriors. This would more than be enough to be the Dominion down until the Legion could reform, and not only defeat the Aldmeri Dominion, but also return their provinces to the Empire's control. Remember I never even mentioned the third great warrior race, the Orsimer, who are by all accounts deadly and brutal heavy infantry. The Empire has these to fight the Dominion, and two of the races are ready to fight the Dominion at command.
Ulfric was a fool to not see that with the Empire he could not only beat the plops out of the Dominion on their way out of Skyrim, but also be able to attack the Dominion at home and raze hell. And the Empire could have requested these two provinces to to declare independent war on the Dominion, effectively wiping its hands clean of any blame by saying it was not responsible, as well as allowing some really deadly Nords to raise war with the Dominion, weakening them further. Remember neither the Empire nor the Dominion can afford war at this moment, however, the Nords and Redguard are still ready to fight. If the Dominion was to be attacked by these two forces the Empire would easily be able to fight the Dominion once the Legion recovered.
So ultimately the Imperials are the only path to victory against the Dominion, however it needs to be done differently then what the two sides are proposing.