I see Rushie as having thick hair, kinda wavy, not short but not reaching his shoulders. He's tall wide shoulders, tanned skin, no facial hair, but maybe sometimes with a light stubble.
Brooding I interpret as frowning. People tell me that I have brooding down pat =P
Just crease in between your eyebrows and look serious, and you've got it!
"Craggy" I see as unshaven/stubbley. But I think I just get that because "craggy" makes me think of "rugged". Pml =P
I'm with Min, I don't think Ioan has the brooding quality. When he tries for it he just looks slightly miffed.
I still think this pic of Sam Witwer ( + hair) is a fair Rushton representation.