The Other Brit
Why He's Possible:
Hunnam has slowly been building a solid career across the pond, with roles in Undeclared (where he held his own against some of the Apatow crowd) on TV, Green Street on film and, back on the goggle box, Sons Of Anarchy.
Talking of, his greasy, long-haired, violent biker persona from Anarchy seems to be the perfect set-up for Thor.
Why he might not nab the role:
Like Skarsgard, he's riding the line of recognition factor - he could be too associated with his other roles to win the part.
Also, his experience means he's probably got a higher asking price than some of the other options.