Thanos was wielding the power of the stone when he put it to Thor's head. I think Thor is capable of wielding the gauntlet, possibly Hulk, and maybe even Stark with the right technology.
I still have questions about this scene
There is something important there in this interaction and I think it may be more that just the fact that Rogers was able to hold off Thanos a moment longer. Thanos' reaction is some realization that is yet to be revealed.