Talmaines(sp)? I'm rereading the series quickly aso I can catch up on everything before the last book comes out and I'm only on The Great Hunt right now, so I am a bit rusty on when characters made there appearances yet, but I think he fits the bill. It was said that Demandred was gathering his army and Talmaines has been recruiting large numbers to the Band in Mat's absence, especially while following the Rebel Aes Sedai and has been present among many different important groups of people. I know I don't have too much evidence to support this, not having read the series over in a long while, but it has been something that has been nagging at my for a good bit.

It wouldn't suprise me in the least if it turns out to be him and I think its something not a lot of people would guess offhand.