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Fun fact: Batman's Batarangs are actually faster and stronger than Green Arrow's arrows static.comicvine.com/.../...8-0487590655-gotha.jpg
And we all know Batman is better at close combat, so Green Arrow has no chance of winning this.
As for Superman vs Thor, the outcome would depend a lot on the location. Superman would probably win on Earth but Thor has a better chance of winning in space. Keep in mind that they both have a habit of holding back.
It also depends on which versions you're referring to. If you're talking about someone like Golden Age Superman, Thor wouldn't even need his hammer to win.