Thor would put up a far better fight than any other Avenger, even surprising Thanos, he fought Malekith with the Aether competitively and it's definitely the most impressive Gem in scope, but Thanos should still crush Thor....
He didn't need the Gem to utterly stomp Hulk.
Thor has done so many crazy feats in scope, I'd love to watch this fight. I can totally see Thanos throwing a moon at Thor and the Odinson doing something straight out of a comic book like shattering it with a leaping lightning punch. I'd have loved for Thor to have been on Titan.